For the purpose of this list, the
inventions are regarded as technological firsts developed within territory of India, as such does not include foreign technologies which India acquired through contact or any Indian origin living in foreign country doing any breakthroughs in foreign land. It also does not include technologies or discoveries developed elsewhere and later invented separately in India, nor inventions by Indian emigres in other places. Changes in minor concepts of design or style and artistic innovations do not appear in the lists.
Indigo dye – Indigo, a blue pigment and a dye, was used in India, which was also the earliest major centre for its production and processing.[2] The Indigofera tinctoria variety of Indigo was domesticated in India.[2] Indigo, used as a dye, made its way to the
Greeks and the
Romans via various trade routes, and was valued as a luxury product.[2]
Jute cultivation – Jute has been cultivated in India since ancient times.[3] Raw jute was exported to the
western world, where it was used to make
ropes and cordage.[3] The Indian jute industry, in turn, was modernised during the British Raj in India.[3] The region of
Bengal was the major centre for Jute cultivation, and remained so before the modernisation of India's jute industry in 1855, when
Kolkata became a centre for jute processing in India.[3]
Sugar – Sugarcane was originally from tropical
South Asia and
Southeast Asia,[4] with different species originating in India, and S. edule and S. officinarum from
New Guinea.[4] The process of producing crystallised sugar from sugar cane, in India, dates to at least the beginning of the common era, with 1st century CE Greek and Roman authors writing on Indian sugar.[5][6] The process was soon transmitted to China with travelling Buddhist monks.[7] Chinese documents confirm at least two missions to India, initiated in 647 CE, for obtaining technology for sugar-refining.[8] Each mission returned with results on refining sugar.[8]
Construction, civil engineering and architecture
Stepwell – While the early history of stepwells is poorly understood, water structures in Western India were their likely predecessor.[9] The three features of stepwells in the subcontinent are evident from one particular site, abandoned by 2500 BCE, which combines a bathing pool, steps leading down to water, and figures of some religious importance into one structure.[9]
Stupa – The origin of the stupa can be traced to 3rd-century BCE India.[10] It was used as a commemorative monument associated with storing sacred relics.[10] The stupa architecture was adopted in
Southeast and
East Asia, where it evolved into the
pagoda, a Buddhist monument used for enshrining sacred relics.[10]
Residential
University –
Nalanda (Nālandā, pronounced[naːlən̪d̪aː]) was a renowned mahavihara (
Buddhist monastic university) in ancient
Magadha (modern-day
Bihar), eastern
India.[11][12][13] Considered by historians to be the world's first residential university[14] and among the greatest centres of learning in the ancient world, it was located near the city of Rajagriha (now
Rajgir) and about 90 kilometres (56 mi) southeast of Pataliputra (now
Patna) and operated from 427 until 1197 CE.[15]
Finance and banking
Cheque/Check – There is early evidence of using cheques/checks. In India, during the
Maurya Empire (from 321 to 185 BC), a commercial instrument called the "Adesha" was in use, which was an order on a banker desiring him to pay the money of the note to a third person (now known as or referred to as a "Negotiable Instrument").[16]
Atya-patya – This variation of tag was being played as early as 100 CE, and was possibly invented by farmers as a way of practicing driving away birds. It was later used as a form of military training in the
Chola Dynasty in close relation to the martial art of
kalaripayattu.[17]
Blindfold chess –
Games prohibited by Buddha includes a variant of ashtapada game played on imaginary boards. Akasam astapadam was an ashtapada variant played with no board, literally "astapadam played in the sky". A correspondent in the
American Chess Bulletin identifies this as likely the earliest literary mention of a blindfold chess variant.[20]
Carrom – The game of carrom originated in
India.[21] One carrom board with its surface made of glass is still available in one of the palaces in
Patiala, India.[22] It became very popular among the masses after
World War I. State-level competitions were being held in the different states of India during the early part of the twentieth century. Serious carrom tournaments may have begun in
Sri Lanka in 1935 but by 1958, both India and Sri Lanka had formed official federations of carrom clubs, sponsoring tournaments and awarding prizes.[23]
Chaturanga – The precursor of
chess originated in India during the
Gupta dynasty (c. 280–550 CE).[24][25][26][27] Both the
Persians and
Arabs ascribe the origins of the game of Chess to the Indians.[26][28][29] The words for "chess" in
Old Persian and
Arabic are chatrang and shatranj respectively – terms derived from caturaṅga in
Sanskrit,[30][31] which literally means an army of four divisions or four corps.[32][33] Chess spread throughout the world and many variants of the game soon began taking shape.[34] This game was introduced to the
Near East from India and became a part of the princely or courtly education of
Persian nobility.[32]Buddhist pilgrims,
Silk Road traders and others carried it to the
Far East where it was transformed and assimilated into a game often played on the intersection of the lines of the board rather than within the squares.[34] Chaturanga reached Europe through Persia, the
Byzantine empire and the expanding
Arabian empire.[33][35]Muslims carried Shatranj to
North Africa,
Sicily, and Spain by the 10th century where it took its final modern form of chess.[34]
Kabaddi – The game of kabaddi originated in India during prehistory.[36] Suggestions on how it evolved into the modern form range from wrestling exercises, military drills, and collective self-defence but most authorities agree that the game existed in some form or the other in India during the period between 1500 and 400 BCE.[36]
Kalaripayattu – One of the world's oldest form of martial arts is
Kalaripayattu that developed in the southwest state of
Kerala in India.[37] It is believed to be the oldest surviving martial art in India, with a history spanning over 3,000 years.[38]
Kho-kho – This is one of the oldest variations of
tag in the world, having been played since as early as the fourth century BCE.[39]
Ludo –
Pachisi originated in India by the 6th century.[40] The earliest evidence of this game in India is the depiction of boards on the caves of Ajanta.[40] A variant of this game, called Ludo, made its way to England during the British Raj.[40]
Mallakhamba – It is a traditional sport, originating from the
Indian subcontinent, in which a
gymnast performs aerial
yoga or
gymnastic postures and
wrestling grips in concert with a vertical stationary or hanging wooden pole, cane, or rope.The earliest literary known mention of Mallakhamb is in the 1135 CE Sanskrit classic Manasollasa, written by
Someshvara III. It has been thought to be the ancestor of
Pole Dancing.
Seven stones – An Indian subcontinent game also called Pitthu is played in rural areas has its origins in the Indus Valley Civilization.[42]
Snakes and ladders – Vaikunta pali Snakes and ladders originated in India as a game based on morality.[43] During British rule of India, this game made its way to England, and was eventually introduced in the United States of America by game-pioneer
Milton Bradley in 1943.[43]
Suits game: Kridapatram is an early
suits game, made of painted rags, invented in Ancient India. The term kridapatram literally means "painted rags for playing."[44][45][46][47][48] Paper playing cards first appeared in East Asia during the 9th century.[44][49] The medieval Indian game of ganjifa, or playing cards, is first recorded in the 16th century.[50]
Table tennis – It has been suggested that makeshift versions of the game were developed by British military officers in
India around the 1860s or 1870s, who brought it back with them.[51]
Vajra-mushti – refers to a wrestling where
knuckleduster like weapon is employed.The first literary mention of vajra-musti comes from the Manasollasa of the
Chalukya king Someswara III (1124–1138), although it has been conjectured to have existed since as early as the
Maurya dynasty[52][53]
Textile and material production
Button – Ornamental buttons—made from
seashell—were used in the
Indus Valley civilization for ornamental purposes by 2000 BCE.[54] Some buttons were carved into geometric shapes and had holes pierced into them so that they could be attached to clothing by using a thread.[54] Ian McNeil (1990) holds that: "The button, in fact, was originally used more as an ornament than as a fastening, the earliest known being found at Mohenjo-daro in the
Indus Valley. It is made of a curved shell and about 5000 years old."[55]
Calico – Calico had originated in the subcontinent by the 11th century and found mention in Indian literature, by the 12th-century writer Hemachandra. He has mentioned calico fabric prints done in a lotus design.[56] The Indian textile merchants traded in calico with the Africans by the 15th century and calico fabrics from
Gujarat appeared in
Egypt.[56] Trade with Europe followed from the 17th century onward.[56] Within India, calico originated in
Kozhikode.[56]
Carding devices – Historian of science
Joseph Needham ascribes the invention of bow-instruments used in textile technology to India.[57] The earliest evidence for using bow-instruments for carding comes from India (2nd century CE).[57] These carding devices, called kaman and dhunaki would loosen the texture of the fibre by the means of a vibrating string.[57]
Cashmere – The fibre cashmere fibre also known as pashm or pashmina for its use in
the handmade shawls of Kashmir, India.[58] The woolen shawls made from wool in Indian administered
Kashmir find written mention between the 3rd century BCE and the 11th century CE.[59]
Charkha (Spinning wheel): invented in India, between 500 and 1000 CE.[60]
Chintz – The origin of Chintz is from the printed all cotton fabric of calico in India.[61] The origin of the word chintz itself is from the
Hindi language word चित्र् (chitr), which means an image.[61][62]
Single roller cotton gin – The
Ajanta Caves of India yield evidence of a single roller cotton gin in use by the 5th century.[66] This cotton gin was used in India until innovations were made in form of foot powered gins.[67] The cotton gin was invented in India as a mechanical device known as charkhi, more technically the "wooden-worm-worked roller". This mechanical device was, in some parts of India, driven by water power.[57]
Palampore – पालमपोर् (Hindi language) of Indian origin[70] was imported to the western world—notable England and
Colonial America—from India.[71][72] In 17th-century England these hand painted cotton fabrics influenced native crewel work design.[71] Shipping vessels from India also took palampore to colonial America, where it was used in
quilting.[72]
Prayer flags – The
Buddhistsūtras, written on cloth in India, were transmitted to other regions of the world.[73] These sutras, written on banners, were the origin of prayer flags.[73] Legend ascribes the origin of the prayer flag to the
Shakyamuni Buddha, whose prayers were written on battle flags used by the devas against their adversaries, the asuras.[74] The legend may have given the Indian bhikku a reason for carrying the 'heavenly' banner as a way of signyfying his commitment to ahimsa.[75] This knowledge was carried into
Tibet by 800 CE, and the actual flags were introduced no later than 1040 CE, where they were further modified.[75] The Indian monk
Atisha (980–1054 CE) introduced the Indian practice of printing on cloth prayer flags to Tibet.[74]
Roller
sugar mill – Geared sugar
rolling mills first appeared in Mughal India, using the principle of rollers as well as
worm gearing, by the 17th century.[77]
Well-being
Indian clubs: The Indian club—which appeared in Europe during the 18th century—was used long by India's native soldiery before its introduction to Europe.[78] During the
British Raj the British officers in India performed calisthenic exercises with clubs to keep in physical condition.[78] From Britain the use of club swinging spread to the rest of the world.[78]
Shampoo – The word shampoo in English is derived from
Hindustanicā̃po (चाँपोIPA:[tʃãːpoː]),[79] and dates to 1762.[80] A variety of herbs and their extracts were used as shampoos since ancient times in India, evidence of early herbal shampoo have been discovered from Indus Valley Civilization site of Banawali dated to 2750–2500 BCE.[81] A very effective early shampoo was made by boiling
Sapindus with dried
Indian gooseberry (aamla) and a few other herbs, using the strained extract. Sapindus, also known as soapberries or soapnuts, is called Ksuna (Sanskrit: क्षुण)[82] in ancient Indian texts and its fruit pulp contain saponins, a natural surfactant. The extract of Ksuna, creates a lather which Indian texts identify as phenaka (Sanskrit: फेनक),[83] leaves the hair soft, shiny and manageable. Other products used for hair cleansing were shikakai (
Acacia concinna), soapnuts (
Sapindus),
hibiscus flowers,[84][85] ritha (
Sapindus mukorossi) and arappu (Albizzia amara).[86]Guru Nanak, the founding prophet and the first
Guru of
Sikhism, made references to soapberry tree and soap in 16th century.[87] Washing of hair and body massage (champu) during a daily strip wash was an indulgence of early colonial traders in India. When they returned to Europe, they introduced their newly learnt habits, including the hair treatment they called shampoo.[88]
Yoga – Yoga as a physical, mental, and spiritual practice originated in
ancient India.[89]
Medicine
Angina pectoris – The condition was named "hritshoola" in ancient India and was described by
Sushruta (6th century BCE).[90]
Ayurvedic and
Siddha medicine – Ayurveda and Siddha are ancient systems of medicine practised in South Asia. Ayurvedic ideas can be found in the Hindu text[91] (mid-first millennium BCE). Ayurveda has evolved over thousands of years, and is still practised today. In an internationalised form, it can be thought of as a
complementary and alternative medicine. In village settings, away from urban centres, it is simply "medicine." The Sanskrit word आयुर्वेदः (āyur-vedaḥ) means "knowledge (veda) for longevity (āyur)".[92] Siddha medicine is mostly prevalent in South India, and is transmitted in Tamil, not Sanskrit, texts. Herbs and minerals are basic raw materials of the Siddha therapeutic system whose origins may be dated to the early centuries CE.[93][94]
Leprosy: Kearns & Nash (2008) state that the first mention of leprosy is described in the Indian medical treatise Sushruta Samhita (6th century BCE).[95] However, The Oxford Illustrated Companion to Medicine holds that the mention of leprosy, as well as ritualistic cures for it, were described in the Atharva-veda (1500–1200 BCE), written before the Sushruta Samhita.[96]
Lithiasis treatment – The earliest operation for treating lithiasis, or the formations of stones in the body, is also given in the Sushruta Samhita (6th century BCE).[97] The operation involved exposure and going up through the floor of the bladder.[97]
Visceral leishmaniasis, treatment of – The Indian (Bengali) medical practitioner
Upendranath Brahmachari (19 December 1873 – 6 February 1946) was nominated for the
Nobel Prize in Physiology or Medicine in 1929 for his discovery of 'ureastibamine (
antimonialcompound for treatment of
kala azar) and a new disease, post-kalaazar dermal leishmanoid.'[98] Brahmachari's cure for Visceral leishmaniasis was the urea salt of para-amino-phenyl stibnic acid which he called Urea Stibamine.[99] Following the discovery of Urea Stibamine, Visceral leishmaniasis was largely eradicated from the world, except for some underdeveloped regions.[99]
Ganja was used as herb for ayurverdic medicine development for last 2,000 years. The Sushruta Samhita, an ancient medical treatise, recommends cannabis plant extract for treating respiratory ailments and diarrhoea.
Otoplasty – Ear surgery was developed in
ancient India and is described in the medical compendium, the Sushruta Samhita (Sushruta's Compendium,
c. 500 AD). The book discussed otoplastic and other
plastic surgery techniques and procedures for correcting, repairing and reconstructing ears,
noses, lips, and genitalia that were amputated as criminal, religious, and military punishments. The ancient Indian
medical knowledge and plastic surgery techniques of the Sushruta Samhita were practiced throughout Asia until the late 18th century; the October 1794 issue of the contemporary British Gentleman's Magazine reported the practice of
rhinoplasty, as described in the Sushruta Samhita. Moreover, two centuries later, contemporary practices of otoplastic praxis were derived from the techniques and procedures developed and established in antiquity by Sushruta.[100][101]
Tonsillectomy – Tonsillectomies have been practiced for over 2,000 years, with varying popularity over the centuries.[102] The earliest mention of the procedure is in "Hindu medicine" from about 1000
BCE
Caesarian section – The
Sanskrit medical treatise Sushruta Samhita, composed in the early 1st millennium CE, mentions post-mortem caesarean sections.[103] The first available non-mythical record of a C-section is the mother of
Bindusara (born
c. 320 BC, ruled 298 –
c. 272 BC), the second
MauryanSamrat (
emperor) of India, accidentally consumed poison and died when she was close to delivering him.
Chanakya, Chandragupta's teacher and adviser, made up his mind that the baby should survive. He cut open the belly of the queen and took out the baby, thus saving the baby's life.[104]
Equestrianism
Toe stirrup – The earliest known manifestation of the stirrup, which was a toe loop that held the big toe was used in India in as early as 500 BCE[105] or perhaps by 200 BCE according to other sources.[106][107] This ancient stirrup consisted of a looped rope for the big toe which was at the bottom of a saddle made of fibre or leather.[107] Such a configuration made it suitable for the warm climate of most of India where people used to ride horses barefoot.[107] A pair of megalithic double bent iron bars with curvature at each end, excavated in
Junapani in the central Indian state of
Madhya Pradesh have been regarded as stirrups although they could as well be something else.[108] Buddhist carvings in the temples of Sanchi,
Mathura and the
Bhaja caves dating back between the 1st and 2nd century BCE figure horsemen riding with elaborate saddles with feet slipped under girths.[109][110][111]Sir John Marshall described the Sanchi relief as "the earliest example by some five centuries of the use of stirrups in any part of the world".[111] In the 1st century CE horse riders in northern India, where winters are sometimes long and cold, were recorded to have their booted feet attached to hooked stirrups.[106] However the form, the conception of the primitive Indian stirrup spread west and east, gradually evolving into the stirrup of today.[107][110]
Metallurgy, gems and other commodities
Iron working – Iron works were developed in India, around the same time as, but independently of,
Anatolia and the
Caucasus. Archaeological sites in India, such as
Malhar, Dadupur, Raja Nala Ka Tila and Lahuradewa in present-day
Uttar Pradesh show iron implements in the period between 1800 BCE—1200 BCE.[112] Early iron objects found in India can be dated to 1400 BCE by employing the method of
radiocarbon dating.
Spikes,
knives,
daggers,
arrow-heads,
bowls,
spoons,
saucepans,
axes,
chisels, tongs, door fittings etc. ranging from 600 BCE to 200 BCE have been discovered from several archaeological sites of India.[113] Some scholars believe that by the early 13th century BCE, iron smelting was practised on a bigger scale in India, suggesting that the date the technology's inception may be placed earlier.[112] In
Southern India (present day
Mysore) iron appeared as early as 11th to 12th centuries BCE; these developments were too early for any significant close contact with the northwest of the country.[114] In the time of
Chandragupta II Vikramaditya (375–413 CE), corrosion-resistant iron was used to erect the
Iron pillar of Delhi, which has withstood corrosion for over 1,600 years.[115]
Crucible steel – Perhaps as early as 300 BCE—although certainly by 200 BCE—high quality steel was being produced in southern India, by what Europeans would later call the crucible technique.[116] In this system, high-purity wrought iron, charcoal, and glass were mixed in a crucible and heated until the iron melted and absorbed the carbon.[116]
Dockyard – The world's earliest enclosed dockyard was built in the Harappan port city of
Lothal circa 2600 BC in Gujarat, India.[117][118]
Diamond drills – in the 12th century BCE or 7th century BCE, Indians not only innovated use of diamond tipped drills but also invented double diamond tipped drills for bead manufacturing.[119]
Diamond cutting and polishing – The technology of cutting and polishing diamonds was invented in India, Ratnapariksha, a text dated to 6th century talks about diamond cutting and Al-Beruni speaks about the method of using lead plate for diamond polishing in the 11th century CE.[120]
Draw bar – The draw bar was applied to sugar-milling, with evidence of its use at
Delhi in the
Mughal Empire by 1540, but possibly dating back several centuries earlier to the
Delhi Sultanate.[121]
Glassblowing – Rudimentary form of glass blowing from
Indian subcontinent is attested earlier than Western Asian counterparts(where it is attested not earlier than 1st century BCE) in the form of
Indo-Pacific beads which uses glass blowing to make cavity before being subjected to
tube drawn technique for bead making dated more than 2500 BP.[125][126] Beads are made by attaching molten glass gather to the end of a blowpipe, a bubble is then blown into the gather.[127] The glass blown vessels were rarely attested and were imported commodity in 1st millennium CE though.
Lost-wax casting – Metal casting by the
Indus Valley civilization began around 3500 BC in the
Mohenjodaro area,[128] which produced one of the earliest known examples of lost-wax casting, an Indian bronze figurine named the "
dancing girl" that dates back nearly 5,000 years to the
Harappan period (c. 3300–1300 BC).[128][129] Other examples include the buffalo, bull and dog found at Mohenjodaro and
Harappa,[130][129][131] two
copper figures found at the Harappan site
Lothal in the district of Ahmedabad of Gujarat,[128] and likely a covered cart with wheels missing and a complete cart with a driver found at
Chanhudaro.[130][131]
Seamless
celestial globe – Considered one of the most remarkable feats in
metallurgy, it was invented in India in between 1589 and 1590 CE.[132][133] Before they were rediscovered in the 1980s, it was believed by modern metallurgists to be technically impossible to produce metal globes without any
seams, even with modern technology.[133]
Tube drawn technology: Indians used tube drawn technology for glass bead manufacturing which was first developed in the 2nd century BCE.[137][138][127]
Wootz steel – Wootz steel is an ultra-high carbon steel and the first form of crucible steel manufactured by the applications and use of
nanomaterials in its microstructure and is characterised by its ultra-high carbon content exhibiting properties such as superplasticity and high impact hardness.[142] Archaeological and
Tamil languageliterary evidence suggests that this manufacturing process was already in existence in South India well before the common era, with
wootz steel exported from the
Chera dynasty and called Seric Iron in Rome, and later known as
Damascus steel in Europe.[143][144][145][146] Reproduction research is undertaken by scientists Dr. Oleg Sherby and Dr. Jeff Wadsworth and the
Lawrence Livermore National Laboratory have all attempted to create steels with characteristics similar to Wootz, but without success. J.D Verhoeven and Al Pendray attained some success in the reconstruction methods of production, proved the role of impurities of ore in the pattern creation, and reproduced Wootz steel with patterns microscopically and visually identical to one of the ancient blade patterns.[147]
Rain gauge – People living in
India began to record rainfall in 400 BCE.[148] The readings were correlated against expected growth. In the
Arthashastra, used for example in
Magadha, precise standards were set as to grain production. Each state storehouse was equipped with a rain gauge to classify land for taxation purposes.[149]
Incense clock – The incense clock is a timekeeping device used to measure minutes, hours, or days, incense clocks were commonly used at homes and temples in dynastic times. Although popularly associated with China the incense clock is believed to have originated in India, at least in its fundamental form if not function.[151][152] Early incense clocks found in China between the 6th and 8th centuries CE—the period it appeared in China all seem to have
Devanāgarī carvings on them instead of Chinese seal characters.[151][152] Incense itself was introduced to China from India in the early centuries CE, along with the spread of Buddhism by travelling monks.[153][154][155]Edward Schafer asserts that incense clocks were probably an Indian invention, transmitted to China, which explains the Devanāgarī inscriptions on early incense clocks found in China.[151]Silvio Bedini on the other hand asserts that incense clocks were derived in part from incense seals mentioned in
Tantric Buddhist scriptures, which first came to light in China after those scriptures from India were translated into Chinese, but holds that the time-telling function of the seal was incorporated by the Chinese.[152]
Standardisation – The oldest applications and evidence of standardisation come from the Indus Valley Civilisation in the 5th millennium BCE characterised by the existence of weights in various standards and categories as[156] well as the Indus merchants usage of a centralised weight and measure system. Small weights were used to measure luxury goods, and larger weights were used for buying bulkier items, such as food grains etc.[156] The weights and measures of the Indus civilisation also reached
Persia and
Central Asia, where they were further modified.[157]
A total of 558 weights were excavated from Mohenjodaro, Harappa, and
Chanhu-daro, not including defective weights. They did not find statistically significant differences between weights that were excavated from five different layers, each about 1.5 m in thickness. This was evidence that strong control existed for at least a 500-year period. The 13.7-g weight seems to be one of the units used in the Indus valley. The notation was based on the
binary and
decimal systems. 83% of the weights which were excavated from the above three cities were cubic, and 68% were made of
chert.[158]
Metal cylinder
rocket: In the 16th century,
Akbar was the first to initiate and use metal cylinder rockets known as bans, particularly against
war elephants, during the Battle of Sanbal.[160][better source needed]
India ink – Known in Asia since the third millennia BCE, and used in India since at least the 4th century BCE.[164]Masi, an early ink in India was an admixture of several chemical components.,[164] with the carbon black from which India ink is produced obtained by burning bones, tar, pitch, and other substances.[165][166][167] Documents dating to the 3rd century CE, written in
Kharosthi, with ink have been unearthed in
Xinjiang,
China.[168] The practice of writing with ink and a sharp pointed needle was common in ancient
South India.[169] Several
Jain sutras in India were compiled in ink.[170]
Philosophy and logic
Catuskoti (Tetralemma) – The four-cornered system of logical argumentation with a suite of four distinct functions that refers to a logical proposition P, with four possibilities that can arise. The tetralemma has many
logico-epistemological applications and has been made ample use of by the Indian philosopher
Nāgarjuna in the
Madhyamaka school. The tetralemma also features prominently in the Greek
skepticist school of
Pyrrhonism, the teachings of which are based on Buddhism. According to
Christopher I. Beckwith ,the founder of the Pyrrhonist school lived in India for 18 months and likely learned the language, which allowed him to carry these teachings to Greece.[171] However, other scholars, such as
Stephen Batchelor[172] and Charles Goodman[173] question Beckwith's conclusions about the degree of Buddhist influence on Pyrrho
Trairūpya – Trairūpya is a logical argument that contains three constituents which a logical ‘sign’ or ‘mark’ (linga) must fulfill to be 'valid source of knowledge' (
pramana):
It should be present in the case or object under consideration, the ‘subject-locus' (pakṣa)
It should be present in a ‘similar case’ or a homologue (sapakṣa)
It should not be present in any ‘dissimilar case’ or heterologue (vipakṣa)
When a ‘sign’ or ‘mark’ (linga) is identified, there are three possibilities: the sign may be present in all, some, or none of the sapakṣas. Likewise, the sign may be present in all, some or none of the vipakṣas. To identify a sign, we have to assume that it is present in the pakṣa, however; that is the first condition is already satisfied. Combining these, Dignaga constructed his ‘Wheel of Reason’ (Sanskrit:
Hetucakra).[174]
The seven predicate theory consists in the use of seven claims about sentences, each preceded by "arguably" or "conditionally" (syat), concerning a single object and its particular properties, composed of assertions and denials, either simultaneously or successively, and without contradiction. These seven claims are the following.
Arguably, it (that is, some object) exists (syad asty eva).
Arguably, it does not exist (syan nasty eva).
Arguably, it exists; arguably, it doesn't exist (syad asty eva syan nasty eva).
Arguably, it is non-assertible (syad avaktavyam eva).
Arguably, it exists; arguably, it is non-assertible (syad asty eva syad avaktavyam eva).
Arguably, it doesn't exist; arguably, it is non-assertible (syan nasty eva syad avaktavyam eva).
Arguably, it exists; arguably, it doesn't exist; arguably it is non-assertible (syad asty eva syan nasty eva syad avaktavyam eva).
Zero – Zero and its operation are first defined by (Hindu astronomer and mathematician) Brahmagupta in 628.[176] The Babylonians used a space, and later a zero glyph, in their written
Sexagesimal system, to signify the 'absent',[177] the Olmecs used a positional zero glyph in their
Vigesimal system, the Greeks, from
Ptolemy's
Almagest, in a
Sexagesimal system. The Chinese used a blank, in the written form of their decimal
Counting rods system. A dot, rather than a blank, was first seen to denote zero, in a decimal system, in the
Bakhshali manuscript.[178] The usage of the zero in the Bakhshali manuscript was dated from between 3rd and 4th centuries, making it the earliest known usage of a written zero, in a decimal place value system.[179]
Hindu number system – With
decimal place-value and a symbol for zero, this system was the ancestor of the widely used
Arabic numeral system. It was developed in the Indian subcontinent between the 1st and 6th centuries CE.[180][181]
Law of signs in multiplication – The earliest use of notation for negative numbers, as
subtrahend, is credited by scholars to the Chinese, dating back to the 2nd century BCE.[182] Like the Chinese, the Indians used negative numbers as subtrahend, but were the first to establish the "law of signs" with regards to the multiplication of positive and negative numbers, which did not appear in Chinese texts until 1299.[182] Indian mathematicians were aware of negative numbers by the 7th century,[182] and their role in mathematical problems of debt was understood.[183] Mostly consistent and correct rules for working with negative numbers were formulated,[184] and the diffusion of these rules led the Arab intermediaries to pass it on to Europe.,[183] for example (+)×(-)=(-),(-)×(-)=(+) etc.
Sign convention – Symbols, signs and mathematical notation were employed in an early form in India by the 6th century when the mathematician-astronomer Aryabhata recommended the use of letters to represent unknown quantities.[185] By the 7th century Brahmagupta had already begun using abbreviations for unknowns, even for multiple unknowns occurring in one complex problem.[185] Brahmagupta also managed to use abbreviations for square roots and cube roots.[185] By the 7th century fractions were written in a manner similar to the modern times, except for the bar separating the
numerator and the
denominator.[185] A dot symbol for
negative numbers was also employed.[185] The
Bakhshali Manuscript displays a cross, much like the modern '+' sign, except that it symbolised subtraction when written just after the number affected.[185] The '=' sign for equality did not exist.[185] Indian mathematics was transmitted to the Islamic world where this notation was seldom accepted initially and the scribes continued to write mathematics in full and without symbols.[186]
Modern
elementary arithmetic – Modum indorum or the method of the Indians for arithmetic operations was popularised by Al-Khwarizmi and Al-Kindi by means of their respective works such as in Al-Khwarizmi's on the Calculation with Hindu Numerals (ca. 825), On the Use of the Indian Numerals (ca. 830)[187] as early as the 8th and 9th centuries.They, amongst other works, contributed to the diffusion of the Indian system of arithmetic in the Middle-East and the West.The significance of the development of the positional number system is described by the French mathematician Pierre Simon Laplace (1749–1827) who wrote:
"It is India that gave us the ingenuous method of expressing all numbers by the means of ten symbols, each symbol receiving a value of position, as well as an absolute value; a profound and important idea which appears so simple to us now that we ignore its true merit, but its very simplicity, the great ease which it has lent to all computations, puts our arithmetic in the first rank of useful inventions, and we shall appreciate the grandeur of this achievement when we remember that it escaped the genius of Archimedes and Apollonius, two of the greatest minds produced by antiquity."
Chakravala method – The Chakravala method, a cyclic algorithm to solve
indeterminatequadratic equations is commonly attributed to
Bhāskara II, (c. 1114 – 1185 CE)[188][189][190] although some attribute it to
Jayadeva (c. 950~1000 CE).[191] Jayadeva pointed out that Brahmagupta's approach to solving equations of this type would yield infinitely large number of solutions, to which he then described a general method of solving such equations.[192] Jayadeva's method was later refined by Bhāskara II in his Bijaganita treatise to be known as the Chakravala method, chakra (derived from cakraṃ चक्रं) meaning 'wheel' in
Sanskrit, relevant to the cyclic nature of the algorithm.[192][193] With reference to the Chakravala method, E. O. Selenuis held that no European performances at the time of Bhāskara, nor much later, came up to its marvellous height of mathematical complexity.[188][192][194]
Trigonometric functions – The
trigonometric functions sine and versine originated in
Indian astronomy along with the cosine and inversine , adapted from the full-chord Greek versions (to the modern half-chord versions). They were described in detail by
Aryabhata in the late 5th century, but were likely developed earlier in the
Siddhantas, astronomical treatises of the 3rd or 4th century.[195][196] Later, the 6th-century astronomer
Varahamihira discovered a few basic trigonometric formulas and identities, such as sin^2(x) + cos^2(x) = 1.[197]
Madhava series – The infinite series for π and for the trigonometric
sine,
cosine, and
arctangent is now attributed to Madhava of Sangamagrama (c. 1340 – 1425) and his Kerala school of astronomy and mathematics.[199][200] He made use of the series expansion of to obtain an infinite series expression for π.[199] Their rational approximation of the error for the finite sum of their series are of particular interest. They manipulated the error term to derive a faster converging series for π.[201] They used the improved series to derive a rational expression,[201] for π correct up to eleven decimal places, i.e..[202][203] Madhava of Sangamagrama and his successors at the
Kerala school of astronomy and mathematics used geometric methods to derive large sum approximations for sine, cosine, and arctangent. They found a number of special cases of series later derived by Brook Taylor series. They also found the second-order Taylor approximations for these functions, and the third-order Taylor approximation for sine.[204][205][206]
Power series – The Kerala school of astronomy and mathematics or the Kerala school was a school of mathematics and astronomy founded by Madhava of Sangamagrama in Tirur, Malappuram, Kerala, India. Their work, completed two centuries before the invention of calculus in Europe, provided what is now considered the first example of a power series (apart from geometric series). However, they did not formulate a systematic theory of differentiation and integration.[207]
Finite difference
interpolation – The Indian mathematician
Brahmagupta presented what is possibly the first instance[208][209] of finite difference interpolation around 665 CE.[210]
Algebraic abbreviations – The mathematician
Brahmagupta had begun using abbreviations for unknowns by the 7th century.[185] He employed abbreviations for multiple unknowns occurring in one complex problem.[185] Brahmagupta also used abbreviations for
square roots and
cube roots.[185]
Combinatorics – the
Bhagavati Sutra had the first mention of a combinatorics problem; the problem asked how many possible combinations of tastes were possible from selecting tastes in ones, twos, threes, etc. from a selection of six different tastes (sweet, pungent, astringent, sour, salt, and bitter). The Bhagavati is also the first text to mention the
choose function.[216] In the second century BC,
Pingala included an enumeration problem in the
Chanda Sutra (also Chandahsutra) which asked how many ways a six-syllable metre could be made from short and long notes.[217][218] Pingala found the number of metres that had long notes and short notes; this is equivalent to finding the
binomial coefficients.
Jain texts define five different types of
infinity – the infinite in one direction, the infinite in two directions, the infinite in area, the infinite everywhere, and the infinite perpetually.[219] and the Satkhandagama
Fibonacci numbers – This sequence was first described by
Virahanka (c. 700 CE), Gopāla (c. 1135), and
Hemachandra (c. 1150),[220] as an outgrowth of the earlier writings on Sanskrit prosody by
Pingala (c. 200 BCE).
Pascal's triangle – Described in the 6th century CE by
Varahamihira[197] and in the 10th century by
Halayudha,[221] commenting on an obscure reference by
Pingala (the author of an earlier work on prosody) to the "Meru-prastaara", or the "Staircase of Mount Meru", in relation to binomial coefficients. (It was also independently discovered in the 10th or 11th century in Persia and China.)
Integral solution to
Pell's equation – About a thousand years before
Pell's time, Indian scholar Brahmagupta (598–668 CE) was able to find integral solutions to vargaprakṛiti (Pell's equation):[222][223] where N is a non-square integer, in his
Brâhma-sphuṭa-siddhânta treatise.[224]
Ardhacheda – Earlier than
Michael Stifel, the 8th century
Jain mathematician
Virasena is credited with a precursor to the binary logarithm. Virasena's concept of ardhacheda has been defined as the number of times a given number can be divided evenly by two. This definition gives rise to a function that coincides with the binary logarithm on the powers of two,[225] but it is different for other integers, giving the
2-adic order rather than the logarithm.[226]
Kuṭṭaka – The Kuṭṭaka algorithm has much similarity with and can be considered as a precursor of the modern day
extended Euclidean algorithm. The latter algorithm is a procedure for finding integers x and y satisfying the condition ax + by =
gcd(a, b).[227]
Diamond mining and diamond tools: Diamonds were first recognised and mined in central India,[231][232][233] where significant alluvial deposits of the stone could then be found along the rivers
Penner,
Krishna and
Godavari. It is unclear when diamonds were first mined in India, although estimated to be at least 5,000 years ago.[234] India remained the world's only source of diamonds until the discovery of diamonds in Brazil in the 18th century.[235][236][237]Golconda served as an important centre for diamonds in
central India.[238] Diamonds then were exported to other parts of the world, including Europe.[238] Early references to diamonds in India come from
Sanskrit texts.[239] The Arthashastra of
Kautilya mentions diamond trade in India.[237]Buddhist works dating from the 4th century BCE mention it as a well-known and precious stone but don't mention the details of diamond cutting.[231] Another Indian description written at the beginning of the 3rd century describes strength, regularity, brilliance, ability to scratch metals, and good refractive properties as the desirable qualities of a diamond.[231] A Chinese work from the 3rd century BCE mentions: "Foreigners wear it [diamond] in the belief that it can ward off evil influences".[231] The Chinese, who did not find diamonds in their country, initially used diamonds as a "jade cutting knife" instead of as a jewel.[231]
Zinc mining and
medicinal zinc – Zinc was first smelted from zinc ore in India.[240] Zinc mines of Zawar, near
Udaipur,
Rajasthan, were active during early Christian era.[241][242] There are references of medicinal uses of zinc in the
Charaka Samhita (300 BCE).[243] The
Rasaratna Samuccaya which dates back to the Tantric period (
c. 5th – 13th century CE) explains the existence of two types of ores for zinc metal, one of which is ideal for metal extraction while the other is used for medicinal purpose.[243][244] India was to melt the first derived from a long experience of the old alchemy zinc by the distillation process, an advanced technique. The ancient Persians had also tried to reduce zinc oxide in an open stove, but had failed. Zawar in Tiri valley of Rajasthan is the first known old zinc smelting site in the world.[citation needed] The distillation technique of zinc production dates back to the 12th century CE and is an important contribution of India in the world of science.
Space
Earth's orbit (
Sidereal year): The
Hindu cosmological time cycles explained in the Surya Siddhanta (c.600 CE), give the average length of the sidereal year (the length of the Earth's revolution around the Sun) as 365.2563627 days, which is only a negligible 1.4 seconds longer than the modern value of 365.256363004 days.[245][failed verification][nb 1]
Preliminary concept of gravity – The concept of gravity as attracting objects towards Earth was already known to Greek scholars,
Brahmagupta in sixth century CE also described gravity as an attractive force, using the term gurutvākarṣaṇa in which heavier objects attract towards the earth.[247][248][249]
Periodicity of comets – Indian astronomers by the 6th century CE believed that comets were apparitions that re-appeared periodically. This was the view expressed in the 6th century by the astronomers
Varahamihira and Bhadrabahu, and the 10th-century astronomer
Bhattotpala listed the names and estimated periods of certain comets, but it is unfortunately not known how these figures were calculated or how accurate they were.[250]
Punch (drink) a
mixed drink containing fruits or fruit juice that can be both alcoholic and non-alcoholic originated in the Indian subcontinent before making its way into England by passage through the
East India Company.[254] This beverage is very popular among the world with many varietal flavors and brands throughout the
beverage industry.
Hookah or water pipe: according to Cyril Elgood (PP.41, 110), the physician Irfan Shaikh, at the court of the Mughal emperor
Akbar I (1542–1605) invented the Hookah or water pipe used most commonly for smoking
tobacco.[255][256][257][258]
Modern India
Medicine
Urea stibamine – Sir
Upendranath Brahmachari synthesised
urea-stibamine (carbostibamide) in 1922 and determined that it was an effective treatment for
kala-azar (visceral leishmaniasis).
post-kala-azar dermal leishmaniasis – n 1922, Brahmachari also discovered a new, deadly form of
leishmaniasis. He called it dermal leishmanoid, marked by the appearance of sudden eruptions on the face of the patients without fever or other complaints. He observed it as a disease in partially cured cases of kala-azar, along with those who had no history of the disease at all.[259] It has since been termed as
post-kala-azar dermal leishmaniasis.
In vitro fertilisation – the second successful birth of a 'test tube baby' occurred in India just 67 days after Louise Brown was born. The girl, named Durga, was conceived in vitro using a method developed independently by
Subhash Mukhopadhyay, a physician and researcher from
Kolkata. Mukhopadhyay had been performing experiments on his own with primitive instruments and a household refrigerator.[261] However, state authorities prevented him from presenting his work at scientific conferences,[262] and it was many years before Mukhopadhyay's contribution was acknowledged in works dealing with the subject.[263][better source needed]
Microwave communication – The first public demonstration of microwave transmission was made by
Jagadish Chandra Bose, in Calcutta, in 1895, two years before a similar demonstration by Marconi in England, and just a year after
Oliver Lodge's commemorative lecture on Radio communication, following Hertz's death. Bose's revolutionary demonstration forms the foundation of the technology used in mobile telephony, radars, satellite communication, radios, television broadcast, WiFi, remote controls and countless other applications.[267][268]
Low Mobility Large cell (LMLC), is a feature of 5G and is designed to enhance the signal transmission range of a basestation several times, helping service providers cost-effectively expand coverage in rural areas.[269]
Julia is a high-level, dynamic programming language. Its features are well suited for numerical analysis and computational science.
Viral B. Shah an Indian computer scientist contributed to the development of the language in Bangalore while also actively involved in the initial design of the Aadhaar project in India using
India Stack.[273]
RISC-V ISA (microprocessor) implementations (a US standard, not from India, but some implementations are such as those below):
SHAKTI – Open Source, Bluespec System
Verilog definitions, for FinFET implementations of the ISA, have been created at
IIT Madras, and are hosted on
GitLab.[276]
VEGA Microprocessors – India's first indigenous 64-bit, superscalar, out-of-order, multi-core RISC-V Processor design, developed by
C-DAC.[277]
File Transfer Protocol (FTP) – A standard communication protocol used for the transfer of computer files from a server to a client on a computer network. FTP is built on a client–server model architecture using separate control and data connections between the client and the server.
Abhay Bhushan is the author of the File Transfer Protocol (which he started working on while he was a student at IIT-Kanpur) and the early versions of email protocols[278]
Construction, civil engineering and architecture
CO2-treated-C&D, researchers at the Centre for Sustainable Technologies (CST), IISc, are exploring ways to store carbon dioxide from industrial flue gas in excavated soil in Construction and Demolition (C&D) waste. the effect of injecting carbon dioxide gas into clayey soil—typically excavated from construction sites. This resulted in better stabilization of clay by cement and lime, and reduced the surface area, pore volume and lime reactivity of clay in soil, thereby improving the bulk engineering performance of the material.[279][280]
Rib & spine/Spine & Wing technique,
NHAI has developed a flyover design which allows to save cost, time, minimum material usage and allows light under the flyover using the same technique.
(I)-TM Tunneling technique:(I)-TM as Himalayan tunnelling method for tunnelling through the Himalayan geology to build tunnels in Jammu and Kashmir. Engineers decided to provide rigid supports using 'ISHB' as against the lattice girder method used in the New Austrian Tunnelling Method.ISHB uses nine-metre pipes in the mountains. It is called pipe roofing. Engineers made an umbrella using these perforated poles and filled them with PU grout.[281][282][283]
Plastic road are made entirely of plastic or of composites of plastic with other materials. Plastic roads are different from standard roads in the respect that standard roads are made from asphalt concrete, which consists of mineral aggregates and asphalt. Most plastic roads sequester
plastic waste within the asphalt as an aggregate. Plastic roads first developed by
Rajagopalan Vasudevan in 2001[284][285][286]
Finance and banking
Payments bank is an Indian new model of banks conceptualised by the Reserve Bank of India (RBI) without issuing credit.
Paleontology
In 2024, one of the longest snakes to ever exist,
Vasuki indicus, was discovered by scientists from the
Indian Institute of Technology. The snake was estimated to be between 10.9 and 15.2 metres in length and lived 47 million years ago. The fossilised vertebrae of Vasuki indicus were discovered in a lignite mine in
Gujarat. It was likely a slow moving predator who killed its prey through constriction.[287]
In 2018, scientists from the
Geological Survey of India and the Indian Institute of Technology discovered the fossil remains of a previously unknown dinosaur species in the
Thar Desert region of Jaisalmer, Rajasthan. The dinosaur is named
Tharosaurus indicus, after the Thar Desert and India.[288]
Genetics
Amrapali mango – A named mango cultivar introduced in 1971 by Dr. Pijush Kanti Majumdar at the Indian Agriculture Research Institute in Delhi.
Mynvax – The world's first "warm" COVID-19 vaccine, developed by
IISc, capable of withstanding 37 °C (99 °F) for a month and neutralise all coronavirus variants of concern.[289]
ZyCoV-D vaccine – The world's first DNA-based COVID-19 vaccine.[290]
Metallurgy, manufacturing, and industry
Carbon nitride solar reactor – In September 2021, A team from the
Institute of Nano Science and Technology (INST), Mohali, has fabricated a prototype reactor which operates under natural sunlight to produce hydrogen at a scale of around 6.1 litres in eight hours. They have used an earth-abundant chemical called carbon nitrides as a catalyst for the purpose.[291][292]
High ash coal gasification (coal to methanol) – The central government gave the country world's first 'coal to methanol' (CTM) plant built by the
Bharat Heavy Electricals Limited (BHEL). The plant was inaugurated in BHEL's Hyderabad unit, The pilot project is the first that uses the gasification method for converting high-ash coal into methanol. Handling of high ash and heat required to melt this high amount of ash is a challenge in the case of Indian coal, which generally has high ash content. Bharat Heavy Electricals Limited has developed the fluidized bed gasification technology suitable for high ash Indian coals to produce syngas and then convert syngas to methanol with 99% purity.[293]
Controlled shunt reactor – In 2002,
Bharat Heavy Electricals Limited has successfully developed a first-of-its-kind in the world device for improving power transfer capability and reducing transmission losses in the country's highest rating (400 kV) transmission lines.The device is called Controlled Shunt Reactor.[294][295]
DMR grade steel – For several high-technology applications, such as military hardware and aerospace, need to possess ultrahigh strength (UHS; minimum yield strength of 1380 MPa (200 ksi)) coupled with high fracture toughness in order to meet the requirement of minimum weight while ensuring high reliability.
JD-1 alloy – A special lightweight alloy developed by
Jindal Defence with a minimum guaranteed hardness of 500 HB. It can be used in aerospace, small arms, and engineering solutions. It is mainly used in armoured jacket.
Sorption-enhanced steam methane reforming (SESMR) – In April 2022, the scientists from CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad developed a fluidized bed reactor (FBR) facility in Hyderabad to perform sorption enhanced steam methane reforming (SESMR) to achieve clean hydrogen in its purest form. The team of scientists have designed a hybrid material to simulate capturing carbon dioxide in-situ (onsite) and converting it into clean hydrogen from non-fuel grade bioethanol.[296]
Spray-drying buffalo milk – The collective consensus of dairy experts worldwide was that buffalo milk could not be spray-dried due to its high fat content. Harichand Megha Dalaya & his invention of the spray dry equipment, led to the world's first buffalo milk spray-dryer, at Amul Dairy in Gujarat.
Jackal steel – An advanced grade high-strength, low-alloy steel. The technology of Jackal steel has been passed on to Steel Authority of India Limited (SAIL) and MIDHANI for its bulk production.
High-Rise Pantograph – The new-design world record pantograph, developed completely in-house for use in DFC & other freight routes with height of 7.5 metres (25 ft).[297]
Commercial
CCU plant: Tuticorin Alkali Chemicals and Fertilizers Limited (TFL) partnered with Carbon Clean to create the world's first fully commercial CCU plant. The 10 MW facility captures coal-fired boiler flue gas and uses it to deliver industrial quality CO2. The 10 MW facility captures coal-fired boiler flue gas and uses it to deliver industrial quality CO2.[298] The technology has been developed by Carbon Clean Solutions, headquartered in London – a start-up by two Indian engineers focusing on carbon dioxide separation technology.There are many chemicals exported out of India where CO2 is the raw material.[299]
Triple-stack container freight train[300][301] – In order to ensure new streams of traffic and commodities and to bring about a modal shift, the DFC is undertaking trials for running smaller than usual containers, known as dwarf containers (where the container height is lower by 660 mm than normal containers), in triple-stack formation to further improve the profitability of train operations. It may be possible to run these as double-stack on conventional routes and triple-stack on routes with high-rise OHE, once the trials are successfully completed.[302]
Metrology
Crescograph – The crescograph, a device for measuring growth in plants, was invented in the early 20th century by the Bengali scientist Sir
Jagadish Chandra Bose.[303][304]
Bipyrazole Organic Crystals, the piezoelectric molecules developed by
IISER scientists recombine following mechanical fracture without any external intervention, autonomously self-healing in milliseconds with crystallographic precision.[307]
Single-crystalline Scandium Nitride, that has the ability to convert infrared light into energy, Scientists based in Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bengaluru have discovered a novel material that can emit, detect, and modulate infrared light with high efficiency making it useful for solar and thermal energy harvesting and for optical communication devices.[308][309]
Indian Ocean Dipole is an unusual pattern in the ocean-atmosphere system of the equatorial Indian Ocean that influences the monsoon and can offset the adverse impact of El Nino. It is typically characterized by cooler than normal eastern equatorial Indian Ocean and warmer than normal west and unusual equatorial easterly winds. It was discovered in Centre for Atmospheric And Oceanic Sciences,
IISc. team led by NH Saji in 1999.[310]
Solution combustion synthesis (SCS) was accidentally discovered in 1988 at Indian Institute of Science (IISc), Bengaluru, India. SCS involves an exothermic redox chemical reaction between an oxidizer like metal nitrate and a fuel in an aqueous medium.[311]
Electrically Excited Synchronous Motor (EESM) or Rare earth free motor: In 2021 deep-tech startup Chara Technologies has built scalable, cloud-controlled electric vehicle motors free of toxic rare-earth metals, thus cutting a massive dependency on imports to accelerate electric mobility in India.[312][313]
Weapon systems
ATAGS – Bharat Forge and the DRDO has developed world's first electric artillery gun[314]
Rifle-rated ballistic helmet,
MKU has developed what it bills as "a first-of-its-kind rifle-rated ballistic helmet", MKU states that the Kavro Doma 360 is "the first anti-rifle helmet in the world that does not have bolts or any metal parts"[315]
Critical Situation Response Vehicle (CSRV) – The Central Reserve Police Force (CRPF) has made and inducted a bomb/bulletproof armoured vehicle. The latest all-terrain highly sophisticated vehicle 'CSRV' has given a shot in the arm to the Central Reserve Police Force engaged in counter-terror operations.
E-bomb – The Defence Research and Development Organisation (DRDO) has been developing an e-bomb which will emit electromagnetic shock waves that destroy electronic circuits and communication networks of enemy force.[316] The tow bodies in Lakshya-2 Weapon Delivery Configuration carry High Energy Weapon Payload.[317]
Phosphoric Acid Fuel Cell air-independent propulsion (PAFC AIP) is a 270 kilowatt phosphoric acid fuel cell (PAFC) air-independent propulsion (AIP) system to power the Kalvari-class submarines is developed by the
Naval Materials Research Laboratory of Indian Defence Research and Development Organisation in collaboration with
Larsen & Toubro and
Thermax. The patent is owned by
DRDO. Its application is considered to be wide and it can also power ships in future.[318]
Indigenisation and improvements
Helmet AC - Featuring a plastic top and built-in-fan-like structure, the AC helmets are powered by a battery pack, which is worn by the traffic police officials on their waist. These helmets work for around 8 hours on a single full charge.[319]
CNG car/vehicle –
Bajaj Auto launched the first 'commercial' lot of its CNG (Compressed Natural Gas) autorickshaws in Delhi on 29 May 2000.
Digital rupee (e₹) or eINR or e-rupee is a tokenised digital version of the Indian rupee, to be issued by the Reserve Bank of India (RBI) as a central bank digital currency (CBDC). Digital Rupee is using blockchain distributed-ledger technology. Digital rupee users to hit 50,000 by Jan-end on better acceptance.[320]
MD-15 is a fuel grade in which Methanol is blended with diesel. Research Design and Standards Organisation (RDSO), in collaboration with the Indian Oil Corporation Ltd (IOCL), has developed a special cost-effective fuel that would not only minimize IR's dependency on diesel, but will also be emit fewer pollutants. IOCL developed the composition, adding 14% additives (developed indigenously by IOCL) along with 71% mineral diesel, 15% methanol. MD-15 fuelled engine has shown superior performance, emission and combustion characteristics than the mineral diesel fuelled engine.[321][322]
Unified Payments Interface – An instant real-time payment system developed by National Payments Corporation of India (NPCI) facilitating person-to-merchant (P2M) transactions through inter-bank peer-to-peer (P2P) mechanism. UPI doesn't need an internet connection for financial transactions, and cardless ATM transactions can also occur using UPI. UPI is not an alternative to a wallet, but more of a solution to the money printing problem.
Basu's theorem – The Basu's theorem, a result of
Debabrata Basu (1955) states that any complete sufficient statistic is independent of any ancillary statistic.[326][327]
Magical Indian Math discovery: Numbers 495 and 6174. The Indian mathematician Dattaraya Ramchandra Kaprekar discovered the number 6174 is reached after repeatedly subtracting the smallest number from the largest number that can be formed from any four digits not all the same. The number 495 is similarly reached for three digits number.
Kosaraju's algorithm is a linear time algorithm to find the strongly connected components of a directed graph. Aho, Hopcroft and Ullman credit it to S. Rao Kosaraju and Micha Sharir. Kosaraju suggested it in 1978.
Shrikhande graph –
Graph invented by the Indian mathematician S.S. Shrikhande in 1959.
Sciences
Ammonium nitrite, synthesis in pure form –
Prafulla Chandra Roy synthesised NH4NO2 in its pure form, and became the first scientist to have done so.[331] Prior to Ray's synthesis of Ammonium nitrite it was thought that the compound undergoes rapid thermal decomposition releasing nitrogen and water in the process.[331]
Ashtekar variables – In theoretical physics, Ashtekar (new) variables, named after
Abhay Ashtekar who invented them, represent an unusual way to rewrite the metric on the three-dimensional spatial slices in terms of a
SU(2)gauge field and its complementary variable. Ashtekar variables are the key building block of
loop quantum gravity.
Bhatnagar-Mathur Magnetic Interference Balance: Invented jointly by
Shanti Swarup Bhatnagar and K.N. Mathur in 1928, the so-called 'Bhatnagar-Mathur Magnetic Interference Balance' was a modern instrument used for measuring various magnetic properties.[332] The first appearance of this instrument in Europe was at a
Royal Society exhibition in London, where it was later marketed by British firm Messers Adam Hilger and Co, London.[332]
Bhabha scattering – In 1935, Indian nuclear physicist
Homi J. Bhabha published a paper in the Proceedings of the Royal Society, Series A, in which he performed the first calculation to determine the cross section of electron-positron scattering.[333] Electron-positron scattering was later named Bhabha scattering, in honour of his contributions in the field.[333]
Bose–Einstein statistics,
condensate – On 4 June 1924 the Indian physicist
Satyendra Nath Bose mailed a short manuscript to
Albert Einstein entitled
Planck's Law and the Light Quantum Hypothesis seeking Einstein's influence to get it published after it was rejected by the prestigious journal Philosophical Magazine.[334] The paper introduced what is today called Bose statistics, which showed how it could be used to derive the Planck blackbody spectrum from the assumption that light was made of
photons.[334][335] Einstein, recognizing the importance of the paper translated it into German himself and submitted it on Bose's behalf to the prestigious Zeitschrift für Physik.[334][335] Einstein later applied Bose's principles on particles with mass and quickly predicted the Bose-Einstein condensate.[335][336]
Mahalanobis distance – Introduced in 1936 by the Indian (Bengali) statistician
Prasanta Chandra Mahalanobis (29 June 1893 – 28 June 1972), this distance measure, based upon the correlation between variables, is used to identify and analyze differing pattern with respect to one base.[339]
Mercurous nitrite – The compound mercurous nitrite was discovered in 1896 by the Bengali chemist Prafulla Chandra Roy, who published his findings in the Journal of the Asiatic Society of Bengal.[331] The discovery contributed as a base for significant future research in the field of chemistry.[331]
Raman effect – The Encyclopædia Britannica (2008) reports: "change in the wavelength of light that occurs when a light beam is deflected by molecules. The phenomenon is named for
Sir Chandrasekhara Venkata Raman, who discovered it in 1928. When a beam of light traverses a dust-free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident (incoming) beam. Most of this scattered light is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light; its presence is a result of the Raman effect."[341]
Periodicity in Nuclear Properties: A sharp pattern is discovered by an Indian researcher regarding the nuclear properties of chemical elements. The remarkable deviations are noticed near the magic numbers.[343]
Process of formation of the E layer of the ionosphere and night sky luminiscence: Discovered by the Indian physicist, Sisir Kumar Mitra.[344]
Space
Lunar water – Although the presence of water ice on the Moon has been conjectured by various scientists since the 1960s, inconclusive evidence of free water ice had also been identified. The first incontrovertible evidence of water on the Moon was provided by the payload Chace carried by the
Moon Impact Probe released by
Chandrayaan-1 in 2009,[345][346][347] confirmed and established by
NASA.[348]
^Greek astronomer
Hipparchus (c. 190 – c. 120 BC) centuries earlier also calculated sidereal year to be 365 + 1/4 + 1/144 days (365.25694... days ie., 365 days 6 hours 10 min) .[246]
^Zvelebil, Kamil V. (1996). The Siddha Quest for Immortality. Oxford: Mandrake of Oxford.
ISBN978-1-869928-43-8.
^Scharf, Hartmut (1999). "The Doctrine of the Three Humors in Traditional Indian Medicine and the Alleged Antiquity of Tamil Siddha Medicine". Journal of the American Oriental Society. 119 (4): 609–629.
doi:
10.2307/604837.
JSTOR604837.
^Lurie S (April 2005). "The changing motives of cesarean section: from the ancient world to the twenty-first century". Archives of Gynecology and Obstetrics. 271 (4): 281–285.
doi:
10.1007/s00404-005-0724-4.
PMID15856269.
S2CID26690619.
^Marco Ceccarelli (2000). International Symposium on History of Machines and Mechanisms: Proceedings HMM Symposium. Springer.
ISBN0-7923-6372-8. pp 218
^I. M. Drakonoff (1991). Early Antiquity. University of Chicago Press.
ISBN0-226-14465-8. pp 372
^For the etching technique, see MacKay, Ernest (1925). "Sumerian Connexions with Ancient India". The Journal of the Royal Asiatic Society of Great Britain and Ireland (4): 699.
JSTOR25220818.
^
abAgrawal, D. P. (2000). Ancient Metal Technology and Archaeology of South Asia. A Pan-Asian Perspective. New Delhi: Aryan Books International.
ISBN978-81-7305-177-7.
^
abKenoyer, J. M. & H. M.-L. Miller, (1999). Metal Technologies of the Indus Valley Tradition in Pakistan and Western India., in The Archaeometallurgy of the Asian Old World., ed. V. C. Pigott. Philadelphia: The University of Pennsylvania Museum.
^
abSavage-Smith, Emilie (1985). Islamicate Celestial Globes: Their history, Construction, and Use. Smithsonian Institution Press, Washington, D.C.
^Satyawadi, Sudha (1 July 1994). Proto-Historic Pottery of Indus Valley Civilization; Study of Painted Motif. D.K. Printworld. p. 324.
ISBN978-8124600306.
^Blackman, M. James; et al. (1992). The Production and Distribution of Stoneware Bangles at Mohenjo-daro and Harappa as Monitored by Chemical Characterization Studies. Madison, WI, USA: Prehistory Press. pp. 37–44.
^Mark Kenoyer, Jonathan (1998). Ancient Cities of the Indus Valley Civilization. Oxford University Press. p. 260.
^Gwinnett, A. John; Gorelick, L. (1993). "Beads, Scarabs, and Amulets: Methods of Manufacture in Ancient Egypt". Journal of the American Research Center in Egypt. 30: 125–132.
doi:
10.2307/40000232.
ISSN0065-9991.
JSTOR40000232.
^Roddam Narasimha (1985),
Rockets in Mysore and Britain, 1750–1850 A.D.Archived 27 September 2007 at the
Wayback Machine, National Aeronautical Laboratory and Indian Institute of Science"Hyder Ali, prince of Mysore, developed war rockets with an important change: the use of metal cylinders to contain the combustion powder. Although the hammered soft iron he used was crude, the bursting strength of the container of black powder was much higher than the earlier paper construction. Thus a greater internal pressure was possible, with a resultant greater thrust of the propulsive jet. The rocket body was lashed with leather thongs to a long bamboo stick. Range was perhaps up to three-quarters of a mile (more than a kilometre). Although individually these rockets were not accurate, dispersion error became less important when large numbers were fired rapidly in mass attacks. They were particularly effective against cavalry and were hurled into the air, after lighting, or skimmed along the hard dry ground. Hyder Ali's son,
Tippu Sultan, continued to develop and expand the use of rocket weapons, reportedly increasing the number of rocket troops from 1,200 to a corps of 5,000. In battles at
Seringapatam in 1792 and 1799 these rockets were used with considerable effect against the British." – Encyclopædia Britannica (2008). rocket and missile.
^Stephen Batchelor "Greek Buddha: Pyrrho's encounter with early Buddhism in central Asia", Contemporary Buddhism, 2016, pp 195–215
^Charles Goodman, "Neither Scythian nor Greek: A Response to Beckwith's Greek Buddha and Kuzminski's "Early Buddhism Reconsidered"", Philosophy East and West, University of Hawai'i Press Volume 68, Number 3, July 2018 pp. 984–1006
^Ganeri, Jonardon & Tiwari, Heeraman (eds.), (1988). The Character of Logic in India. Albany, NY, USA: State University of New York Press.
ISBN0-7914-3739-6 (HC:acid free), p.7-8
^September 2017, Jessie Szalay-Live Science Contributor 18 (18 September 2017).
"Who Invented Zero?". livescience.com. Retrieved 18 May 2021. {{
cite web}}: |first= has generic name (
help)CS1 maint: numeric names: authors list (
link)
^Nils-Bertil Wallin (19 November 2002).
"The History of Zero". Yale Center for the Study of Globalization. Archived from
the original on 25 August 2016. Retrieved 26 December 2011.
"Geometry, and its branch trigonometry, was the mathematics Indian astronomers used most frequently. In fact, the Indian astronomers in the third or fourth century, using a pre-Ptolemaic Greek table of chords, produced tables of sines and versines, from which it was trivial to derive cosines. This new system of trigonometry, produced in India, was transmitted to the Arabs in the late eighth century and by them, in an expanded form, to the Latin West and the Byzantine East in the twelfth century."
^Van Brummelen, Glen (2009). The mathematics of the heavens and the earth: the early history of trigonometry. Princeton University Press. p. 329.
ISBN9780691129730. (p.111)
^Datta, Bibhutibhusan; Singh, Awadhesh Narayan (2019). "Use of permutations and combinations in India". In Kolachana, Aditya; Mahesh, K.; Ramasubramanian, K. (eds.). Studies in Indian Mathematics and Astronomy: Selected Articles of Kripa Shankar Shukla. Sources and Studies in the History of Mathematics and Physical Sciences. Springer Singapore. pp. 356–376.
doi:
10.1007/978-981-13-7326-8_18.
ISBN978-981-13-7325-1.
S2CID191141516.. Revised by K. S. Shukla from a paper in Indian Journal of History of Science 27 (3): 231–249, 1992,
MRMR1189487. See p. 363.
^Rina Shrivastva (1999).
"Smelting furnaces in Ancient India"(PDF). Indian Journal of History & Science,34(1), Digital Library of India. Archived from
the original(PDF) on 25 April 2012. Retrieved 4 November 2011.
^De, S. N.; Sarkar, J. K.; Tribedi, B. P. (1951). "An experimental study of the action of cholera toxin". The Journal of Pathology and Bacteriology. 63 (4): 707–717.
doi:
10.1002/path.1700630417.
PMID14898376.
Adas, Michael (January 2001). Agricultural and Pastoral Societies in Ancient and Classical History. Temple University Press.
ISBN1-56639-832-0.
Addington, Larry H. (1990). The Patterns of War Through the Eighteenth Century (Illustrated edition). Indiana: Indiana University Press.
ISBN0-253-20551-4.
Alter, J. S. in "Kabaddi, a national sport of India". Dyck, Noel (2000). Games, Sports and Cultures. Berg Publishers:
ISBN1-85973-317-4.
Arensberg, Conrad M. & Niehoff, Arthur H. (1971). Introducing Social Change: A Manual for Community Development (second edition). New Jersey: Aldine Transaction.
ISBN0-202-01072-4
Augustyn, Frederick J. (2004). Dictionary of toys and games in American popular culture. Haworth Press.
ISBN0-7890-1504-8.
Azzaroli, Augusto (1985). An Early History of Horsemanship. Massachusetts: Brill Academic Publishers.
ISBN90-04-07233-0.
Baber, Zaheer (1996). The Science of Empire: Scientific Knowledge, Civilization, and Colonial Rule in India. State University of New York Press.
ISBN0-7914-2919-9.
Bag, A. K. (2005). "Fathullah Shirazi: Cannon, Multi-barrel Gun and Yarghu". Indian Journal of History of Science. 40 (3): 431–6.
Balasubramaniam, R. (2002). Delhi Iron Pillar: New Insights. Delhi: Indian Institute of Advanced Studies [University of Michigan].
ISBN81-7305-223-9.
Banerji, Sures Chandra (1989). A Companion to Sanskrit Literature. Motilal Banarsidass.
ISBN81-208-0063-X.
Barker, Dian (2003). Tibetan Prayer Flags. Connections Book Publishing.
ISBN1-85906-106-0.
Barua, Pradeep (2005). The State at War in South Asia.
Nebraska: University of Nebraska Press.
ISBN0-8032-1344-1.
Blechynden, Kathleen (1905). Calcutta, Past and Present. Los Angeles: University of California.
Bondyopadhyay, Probir K (1988). "Sir J. C. Bose's Diode Detector Received Marconi's First Transatlantic Wireless Signal of December 1901 (The "Italian Navy Coherer" Scandal Revisited)". Proc. IEEE, Vol. 86, No. 1, January 1988.
Boga, Steven (1996). Badminton. Pennsylvania: Stackpole Books.
ISBN0-8117-2487-5
Bourbaki, Nicolas (1998). Elements of the History of Mathematics. Berlin, Heidelberg, and New York: Springer-Verlag.
ISBN3-540-64767-8.
Bressoud, David (2002), "Was Calculus Invented in India?", The College Mathematics Journal (Mathematical Association of America) 33 (1): 2–13
Broadbent, T. A. A.; Kline, M. (October 1968). "Reviewed work(s): The History of Ancient Indian Mathematics by C. N. Srinivasiengar". The Mathematical Gazette. 52 (381): 307–8.
doi:
10.2307/3614212.
JSTOR3614212.
S2CID176660647.
Brown, W. Norman (1964). "The Indian Games of Pachisi, Chaupar, and Chausar". Expedition, 32–35. University of Pennsylvania Museum of Archaeology and Anthropology. 32 (35).
Chamberlin, J. Edward (2007). Horse: How the Horse Has Shaped Civilizations. Moscow: Olma Media Group.
ISBN1-904955-36-3.
Chandra, Anjana Motihar (2007). India Condensed: 5000 Years of History & Culture Marshall Cavendish.
ISBN981-261-350-1
Cooke, Roger (2005). The History of Mathematics: A Brief Course. New York: Wiley-Interscience.
ISBN0-471-44459-6.
Connors, Martin; Dupuis, Diane L. & Morgan, Brad (1992). The Olympics Factbook: A Spectator's Guide to the Winter and Summer Games. Michigan: Visible Ink Press.
ISBN0-8103-9417-0
Dales, George (1974). "Excavations at Balakot, Pakistan, 1973". Journal of Field Archaeology. 1 (1–2): 3–22 [10].
doi:
10.2307/529703.
JSTOR529703.
Daryaee, Touraj (2006) in "Backgammon" in Medieval Islamic Civilization: An Encyclopedia ed. Meri, Josef W. & Bacharach, Jere L, pp. 88–89. Taylor & Francis.
Dauxois, Thierry & Peyrard, Michel (2006). Physics of Solitons. England: Cambridge University Press.
ISBN0-521-85421-0.
Davreu, Robert (1978). "Cities of Mystery: The Lost Empire of the Indus Valley". The World's Last Mysteries. (second edition). Sydney: Reader's Digest.
ISBN0-909486-61-1
Dickinson, Joan Y. (2001). The Book of Diamonds. Dover Publications.
ISBN0-486-41816-2.
Drewes, F. (2006). Grammatical Picture Generation: A Tree-based Approach. New York: Springer.
ISBN3-540-21304-X
Durant, Will (1935). Our Oriental Heritage. New York: Simon and Schuster.
Dutfield, Graham (2003). Intellectual Property Rights and the Life Science Industries: A Twentieth Century History. Ashgate Publishing.
ISBN0-7546-2111-1.
Emsley, John (2003). Nature's Building Blocks: An A-Z Guide to the Elements. England: Oxford University Press.
ISBN0-19-850340-7.
Finger, Stanley (2001). Origins of Neuroscience: A History of Explorations into Brain Function. England: Oxford University Press.
ISBN0-19-514694-8.
Flegg, Graham (2002). Numbers: Their History and Meaning. Courier Dover Publications.
ISBN0-486-42165-1.
Forbes, Duncan (1860). The History of Chess: From the Time of the Early Invention of the Game in India Till the Period of Its Establishment in Western and Central Europe. London: W. H. Allen & co.
Fraser, Gordon (2006). The New Physics for the Twenty-first Century. England: Cambridge University Press.
ISBN0-521-81600-9.
Gangopadhyaya, Mrinalkanti (1980). Indian Atomism: history and sources. New Jersey: Humanities Press.
ISBN0-391-02177-X.
Geddes, Patrick (2000). The life and work of Sir Jagadis C. Bose. Asian Educational Services.
ISBN81-206-1457-7.
Geyer, H. S. (2006), Global Regionalization: Core Peripheral Trends. England: Edward Elgar Publishing.
ISBN1-84376-905-0.
Ghosh, Amalananda (1990). An Encyclopaedia of Indian Archaeology. Brill.
ISBN90-04-09264-1.
Ghosh, S.; Massey, Reginald; and Banerjee, Utpal Kumar (2006). Indian Puppets: Past, Present and Future. Abhinav Publications.
ISBN81-7017-435-X.
Gottsegen, Mark E. (2006). The Painter's Handbook: A Complete Reference. New York: Watson-Guptill Publications.
ISBN0-8230-3496-8.
Goonatilake, Susantha (1998). Toward a Global Science: Mining Civilizational Knowledge. Indiana: Indiana University Press.
ISBN0-253-33388-1.
Guillain, Jean-Yves (2004). Badminton: An Illustrated History. Paris: Editions Publibook
ISBN2-7483-0572-8
Hāṇḍā, Omacanda (1998). Textiles, Costumes, and Ornaments of the Western Himalaya. Indus Publishing.
ISBN81-7387-076-4.
Hayashi, Takao (2005). Indian Mathematics in Flood, Gavin, The Blackwell Companion to Hinduism, Oxford: Basil Blackwell, 616 pages, pp. 360–375, 360–375,
ISBN978-1-4051-3251-0.
Iwata, Shigeo (2008), "Weights and Measures in the Indus Valley", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd edition) edited by
Helaine Selin, Springer, 2254–2255,
ISBN978-1-4020-4559-2.
James, Jeffrey (2003). Bridging the Global Digital Divide.
Cheltenham: Edward Elgar Publishing.
ISBN1-84376-206-4.
Jones, William (1807). The Works of Sir William Jones (Volume 4). London.
Kamarustafa, Ahmet T. (1992). "Part 1 No. 1: Islamic Cartography 1". Cartography in the Traditional Islamic and South Asian Societies. Vol. 2 Book 1. New York: Oxford University Press US.
ISBN0-226-31635-1
Katz, V. J. (1995). "Ideas of Calculus in Islam and India". Mathematics Magazine. 68 (3): 163–174.
doi:
10.2307/2691411.
JSTOR2691411.
Kearns, Susannah C.J. & Nash, June E. (2008). leprosy. Encyclopædia Britannica.
Kieschnick, John (2003). The Impact of Buddhism on Chinese Material Culture. New Jersey: Princeton University Press.
ISBN0-691-09676-7.
Kipfer, Barbara Ann (2000). Encyclopedic Dictionary of Archaeology. (Illustrated edition). New York: Springer.
ISBN978-0-306-46158-3.
Koppel, Tom (2007). Ebb and Flow: Tides and Life on Our Once and Future Planet. Dundurn Press Ltd.
ISBN1-55002-726-3.
McIntosh, Jane (2007). The Ancient Indus Valley: New Perspectives. Illustrated edition. California: ABC-CLIO.
ISBN1-57607-907-4.
Meri, Josef W. (2005). Medieval Islamic Civilization: An Encyclopedia. Routledge.
ISBN0-415-96690-6.
Millar, Stuart (2004). "Using Technology: Handheld PC Bridges Digital Divide". World in Motion: Future, Science and Technology. Denmark: Systime. pp. 167–169.
ISBN87-616-0887-4
Murray, H. J. R. (1913). A History of Chess. England: Oxford University Press.
Narlikar, J. V. (2002). An Introduction to Cosmology. Cambridge University Press.
ISBN0-521-79376-9.
Nejat, Karen Rhea Nemet. (1998). Daily Life in Ancient Mesopotamia. Connecticut: Greenwood Publishing Group.
ISBN0-313-29497-6.
Nitis, Mukhopadhyay (2000). Probability and Statistical Inference. Statistics: A Series of Textbooks and Monographs. 162. Florida: CRC Press USA.
ISBN0-8247-0379-0.
Pacey, Arnold (1991). Technology in World Civilization: A Thousand-year History. MIT Press.
ISBN0-262-66072-5.
Ploker, Kim (2007) "Mathematics in India". The Mathematics of Egypt, Mesopotamia, China, India, and Islam: A Sourcebook New Jersey: Princeton University Press.
ISBN0-691-11485-4
Ponomarev, Leonid Ivanovich (1993). The Quantum Dice. CRC Press.
ISBN0-7503-0251-8.
Possehl, Gregory L. (2002). The Indus Civilization: A Contemporary Perspective. Maryland: Rowman Altamira.
ISBN0-7591-0172-8.
Prathap, Gangan (March 2004). "Indian science slows down: The decline of open-ended research". Current Science. 86 (6): 768–769.
Pruthi, Raj (2004). Prehistory and Harappan Civilization. New Delhi: APH Publishing Corp.
ISBN81-7648-581-0.
Purohit, Vinayak (1988). Arts of Transitional India Twentieth Century. Mumbai: Popular Prakashan.
ISBN0-86132-138-3
Puttaswamy, T. K. (2000), "The Mathematical Accomplishments of Ancient Indian Mathematicians". Mathematics Across Cultures: The History of Non-western Mathematics. New York: Springer Publishing.
ISBN0-7923-6481-3
Rousselet, Louis (1875). India and Its Native Princes: Travels in Central India and in the Presidencies of Bombay and Bengal. London: Chapman and Hall.
Roy, Ranjan (1990), "Discovery of the Series Formula for by Leibniz, Gregory, and Nilakantha", Mathematics Magazine (Mathematical Association of America) 63 (5): 291–306
Saliba, George (1997). "Interfusion of Asian and Western Cultures: Islamic Civilization and Europe to 1500". Asia in Western and World History: A Guide for Teaching. Edited by
Ainslie Thomas Embree &
Carol Gluck. New York: M.E. Sharpe.
ISBN1-56324-265-6.
Sanchez & Canton (2006). Microcontroller Programming: The Microchip PIC. CRC Press.
ISBN0-8493-7189-9.
Sarkar, Tapan K. etc. (2006), History of Wireless, Wiley-IEEE,
ISBN0-471-78301-3.
Schafer, Edward H. (1963). The Golden Peaches of Samarkand: A Study of T'ang Exotics. California: University of California Press.
ISBN0-520-05462-8.
Schwartzberg, Joseph E. (1992). "Part 2: South Asian Cartography: 15. Introduction to South Asian Cartography". The History of Cartography – Cartography in the Traditional Islamic and South Asian Societies (Volume 2 Book 1). Edited by
J.B. Harley and
David Woodward. New York: Oxford University Press USA.
ISBN0-226-31635-1.
Shukla, R.P. in "Laser Interferometers for Measuring Refractive Index of Transparent Materials and Testing of Optical Components", Laser Applications in Material Science and Industry. 20–27. Allied Publishers.
ISBN81-7023-658-4.
Srinivasan, S. Wootz crucible steel: a newly discovered production site in South India. Institute of Archaeology, University College London, 5 (1994), pp. 49–61.
Srinivasan, S. and Griffiths, D. South Indian wootz: evidence for high-carbon steel from crucibles from a newly identified site and preliminary comparisons with related finds. Material Issues in Art and Archaeology-V, Materials Research Society Symposium Proceedings Series Vol. 462.
Stein, Burton (1998). A History of India. Blackwell Publishing.
ISBN0-631-20546-2.
Stepanov, Serguei A. (1999). Codes on Algebraic Curves. Springer.
ISBN0-306-46144-7.
Stillwell, John (2004). Mathematics and its History (2 ed.). Berlin and New York: Springer, 568 pages.
ISBN0-387-95336-1.
Taguchi, Genichi & Jugulum, Rajesh (2002). The Mahalanobis-taguchi Strategy: A Pattern Technology System. John Wiley and Sons.
ISBN0-471-02333-7.
Teresi, Dick; et al. (2002). Lost Discoveries: The Ancient Roots of Modern Science—from the Babylonians to the Maya. New York: Simon & Schuster.
ISBN0-684-83718-8.
Thomas, Arthur (2007) Gemstones: Properties, Identification and Use. London: New Holland Publishers.
ISBN1-84537-602-1
Thrusfield, Michael (2007). Veterinary Epidemiology. Blackwell Publishing.
ISBN1-4051-5627-9.
Upadhyaya, Bhagwat Saran (1954). The Ancient World. Andhra Pradesh: The Institute of Ancient Studies Hyderabad.
Varadpande, Manohar Laxman (2005). History of Indian Theatre. New Delhi: Abhinav Publications.
ISBN81-7017-430-9.
Wenk, Hans-Rudolf; et al. (2003). Minerals: Their Constitution and Origin. England: Cambridge University Press.
ISBN0-521-52958-1.
Whitelaw, Ian (2007). A Measure of All Things: The Story of Man and Measurement.
Macmillan.
ISBN0-312-37026-1.
Wilkinson, Charles K (1943). "Chessmen and Chess". The Metropolitan Museum of Art Bulletin. New Series. 1 (9): 271–279.
doi:
10.2307/3257111.
JSTOR3257111.
Wise, Tad (2002). Blessings on the Wind: The Mystery & Meaning of Tibetan Prayer Flags. Chronicle Books.
ISBN0-8118-3435-2.
Wisseman, S. U. & Williams, W. S. (1994). Ancient Technologies and Archaeological Materials. London: Routledge.
ISBN2-88124-632-X.
Woods, Michael & Woods, Mary B. (2000). Ancient Transportation: From Camels to Canals. Minnesota: Twenty-First Century Books.
ISBN0-8225-2993-9.
For the purpose of this list, the
inventions are regarded as technological firsts developed within territory of India, as such does not include foreign technologies which India acquired through contact or any Indian origin living in foreign country doing any breakthroughs in foreign land. It also does not include technologies or discoveries developed elsewhere and later invented separately in India, nor inventions by Indian emigres in other places. Changes in minor concepts of design or style and artistic innovations do not appear in the lists.
Indigo dye – Indigo, a blue pigment and a dye, was used in India, which was also the earliest major centre for its production and processing.[2] The Indigofera tinctoria variety of Indigo was domesticated in India.[2] Indigo, used as a dye, made its way to the
Greeks and the
Romans via various trade routes, and was valued as a luxury product.[2]
Jute cultivation – Jute has been cultivated in India since ancient times.[3] Raw jute was exported to the
western world, where it was used to make
ropes and cordage.[3] The Indian jute industry, in turn, was modernised during the British Raj in India.[3] The region of
Bengal was the major centre for Jute cultivation, and remained so before the modernisation of India's jute industry in 1855, when
Kolkata became a centre for jute processing in India.[3]
Sugar – Sugarcane was originally from tropical
South Asia and
Southeast Asia,[4] with different species originating in India, and S. edule and S. officinarum from
New Guinea.[4] The process of producing crystallised sugar from sugar cane, in India, dates to at least the beginning of the common era, with 1st century CE Greek and Roman authors writing on Indian sugar.[5][6] The process was soon transmitted to China with travelling Buddhist monks.[7] Chinese documents confirm at least two missions to India, initiated in 647 CE, for obtaining technology for sugar-refining.[8] Each mission returned with results on refining sugar.[8]
Construction, civil engineering and architecture
Stepwell – While the early history of stepwells is poorly understood, water structures in Western India were their likely predecessor.[9] The three features of stepwells in the subcontinent are evident from one particular site, abandoned by 2500 BCE, which combines a bathing pool, steps leading down to water, and figures of some religious importance into one structure.[9]
Stupa – The origin of the stupa can be traced to 3rd-century BCE India.[10] It was used as a commemorative monument associated with storing sacred relics.[10] The stupa architecture was adopted in
Southeast and
East Asia, where it evolved into the
pagoda, a Buddhist monument used for enshrining sacred relics.[10]
Residential
University –
Nalanda (Nālandā, pronounced[naːlən̪d̪aː]) was a renowned mahavihara (
Buddhist monastic university) in ancient
Magadha (modern-day
Bihar), eastern
India.[11][12][13] Considered by historians to be the world's first residential university[14] and among the greatest centres of learning in the ancient world, it was located near the city of Rajagriha (now
Rajgir) and about 90 kilometres (56 mi) southeast of Pataliputra (now
Patna) and operated from 427 until 1197 CE.[15]
Finance and banking
Cheque/Check – There is early evidence of using cheques/checks. In India, during the
Maurya Empire (from 321 to 185 BC), a commercial instrument called the "Adesha" was in use, which was an order on a banker desiring him to pay the money of the note to a third person (now known as or referred to as a "Negotiable Instrument").[16]
Atya-patya – This variation of tag was being played as early as 100 CE, and was possibly invented by farmers as a way of practicing driving away birds. It was later used as a form of military training in the
Chola Dynasty in close relation to the martial art of
kalaripayattu.[17]
Blindfold chess –
Games prohibited by Buddha includes a variant of ashtapada game played on imaginary boards. Akasam astapadam was an ashtapada variant played with no board, literally "astapadam played in the sky". A correspondent in the
American Chess Bulletin identifies this as likely the earliest literary mention of a blindfold chess variant.[20]
Carrom – The game of carrom originated in
India.[21] One carrom board with its surface made of glass is still available in one of the palaces in
Patiala, India.[22] It became very popular among the masses after
World War I. State-level competitions were being held in the different states of India during the early part of the twentieth century. Serious carrom tournaments may have begun in
Sri Lanka in 1935 but by 1958, both India and Sri Lanka had formed official federations of carrom clubs, sponsoring tournaments and awarding prizes.[23]
Chaturanga – The precursor of
chess originated in India during the
Gupta dynasty (c. 280–550 CE).[24][25][26][27] Both the
Persians and
Arabs ascribe the origins of the game of Chess to the Indians.[26][28][29] The words for "chess" in
Old Persian and
Arabic are chatrang and shatranj respectively – terms derived from caturaṅga in
Sanskrit,[30][31] which literally means an army of four divisions or four corps.[32][33] Chess spread throughout the world and many variants of the game soon began taking shape.[34] This game was introduced to the
Near East from India and became a part of the princely or courtly education of
Persian nobility.[32]Buddhist pilgrims,
Silk Road traders and others carried it to the
Far East where it was transformed and assimilated into a game often played on the intersection of the lines of the board rather than within the squares.[34] Chaturanga reached Europe through Persia, the
Byzantine empire and the expanding
Arabian empire.[33][35]Muslims carried Shatranj to
North Africa,
Sicily, and Spain by the 10th century where it took its final modern form of chess.[34]
Kabaddi – The game of kabaddi originated in India during prehistory.[36] Suggestions on how it evolved into the modern form range from wrestling exercises, military drills, and collective self-defence but most authorities agree that the game existed in some form or the other in India during the period between 1500 and 400 BCE.[36]
Kalaripayattu – One of the world's oldest form of martial arts is
Kalaripayattu that developed in the southwest state of
Kerala in India.[37] It is believed to be the oldest surviving martial art in India, with a history spanning over 3,000 years.[38]
Kho-kho – This is one of the oldest variations of
tag in the world, having been played since as early as the fourth century BCE.[39]
Ludo –
Pachisi originated in India by the 6th century.[40] The earliest evidence of this game in India is the depiction of boards on the caves of Ajanta.[40] A variant of this game, called Ludo, made its way to England during the British Raj.[40]
Mallakhamba – It is a traditional sport, originating from the
Indian subcontinent, in which a
gymnast performs aerial
yoga or
gymnastic postures and
wrestling grips in concert with a vertical stationary or hanging wooden pole, cane, or rope.The earliest literary known mention of Mallakhamb is in the 1135 CE Sanskrit classic Manasollasa, written by
Someshvara III. It has been thought to be the ancestor of
Pole Dancing.
Seven stones – An Indian subcontinent game also called Pitthu is played in rural areas has its origins in the Indus Valley Civilization.[42]
Snakes and ladders – Vaikunta pali Snakes and ladders originated in India as a game based on morality.[43] During British rule of India, this game made its way to England, and was eventually introduced in the United States of America by game-pioneer
Milton Bradley in 1943.[43]
Suits game: Kridapatram is an early
suits game, made of painted rags, invented in Ancient India. The term kridapatram literally means "painted rags for playing."[44][45][46][47][48] Paper playing cards first appeared in East Asia during the 9th century.[44][49] The medieval Indian game of ganjifa, or playing cards, is first recorded in the 16th century.[50]
Table tennis – It has been suggested that makeshift versions of the game were developed by British military officers in
India around the 1860s or 1870s, who brought it back with them.[51]
Vajra-mushti – refers to a wrestling where
knuckleduster like weapon is employed.The first literary mention of vajra-musti comes from the Manasollasa of the
Chalukya king Someswara III (1124–1138), although it has been conjectured to have existed since as early as the
Maurya dynasty[52][53]
Textile and material production
Button – Ornamental buttons—made from
seashell—were used in the
Indus Valley civilization for ornamental purposes by 2000 BCE.[54] Some buttons were carved into geometric shapes and had holes pierced into them so that they could be attached to clothing by using a thread.[54] Ian McNeil (1990) holds that: "The button, in fact, was originally used more as an ornament than as a fastening, the earliest known being found at Mohenjo-daro in the
Indus Valley. It is made of a curved shell and about 5000 years old."[55]
Calico – Calico had originated in the subcontinent by the 11th century and found mention in Indian literature, by the 12th-century writer Hemachandra. He has mentioned calico fabric prints done in a lotus design.[56] The Indian textile merchants traded in calico with the Africans by the 15th century and calico fabrics from
Gujarat appeared in
Egypt.[56] Trade with Europe followed from the 17th century onward.[56] Within India, calico originated in
Kozhikode.[56]
Carding devices – Historian of science
Joseph Needham ascribes the invention of bow-instruments used in textile technology to India.[57] The earliest evidence for using bow-instruments for carding comes from India (2nd century CE).[57] These carding devices, called kaman and dhunaki would loosen the texture of the fibre by the means of a vibrating string.[57]
Cashmere – The fibre cashmere fibre also known as pashm or pashmina for its use in
the handmade shawls of Kashmir, India.[58] The woolen shawls made from wool in Indian administered
Kashmir find written mention between the 3rd century BCE and the 11th century CE.[59]
Charkha (Spinning wheel): invented in India, between 500 and 1000 CE.[60]
Chintz – The origin of Chintz is from the printed all cotton fabric of calico in India.[61] The origin of the word chintz itself is from the
Hindi language word चित्र् (chitr), which means an image.[61][62]
Single roller cotton gin – The
Ajanta Caves of India yield evidence of a single roller cotton gin in use by the 5th century.[66] This cotton gin was used in India until innovations were made in form of foot powered gins.[67] The cotton gin was invented in India as a mechanical device known as charkhi, more technically the "wooden-worm-worked roller". This mechanical device was, in some parts of India, driven by water power.[57]
Palampore – पालमपोर् (Hindi language) of Indian origin[70] was imported to the western world—notable England and
Colonial America—from India.[71][72] In 17th-century England these hand painted cotton fabrics influenced native crewel work design.[71] Shipping vessels from India also took palampore to colonial America, where it was used in
quilting.[72]
Prayer flags – The
Buddhistsūtras, written on cloth in India, were transmitted to other regions of the world.[73] These sutras, written on banners, were the origin of prayer flags.[73] Legend ascribes the origin of the prayer flag to the
Shakyamuni Buddha, whose prayers were written on battle flags used by the devas against their adversaries, the asuras.[74] The legend may have given the Indian bhikku a reason for carrying the 'heavenly' banner as a way of signyfying his commitment to ahimsa.[75] This knowledge was carried into
Tibet by 800 CE, and the actual flags were introduced no later than 1040 CE, where they were further modified.[75] The Indian monk
Atisha (980–1054 CE) introduced the Indian practice of printing on cloth prayer flags to Tibet.[74]
Roller
sugar mill – Geared sugar
rolling mills first appeared in Mughal India, using the principle of rollers as well as
worm gearing, by the 17th century.[77]
Well-being
Indian clubs: The Indian club—which appeared in Europe during the 18th century—was used long by India's native soldiery before its introduction to Europe.[78] During the
British Raj the British officers in India performed calisthenic exercises with clubs to keep in physical condition.[78] From Britain the use of club swinging spread to the rest of the world.[78]
Shampoo – The word shampoo in English is derived from
Hindustanicā̃po (चाँपोIPA:[tʃãːpoː]),[79] and dates to 1762.[80] A variety of herbs and their extracts were used as shampoos since ancient times in India, evidence of early herbal shampoo have been discovered from Indus Valley Civilization site of Banawali dated to 2750–2500 BCE.[81] A very effective early shampoo was made by boiling
Sapindus with dried
Indian gooseberry (aamla) and a few other herbs, using the strained extract. Sapindus, also known as soapberries or soapnuts, is called Ksuna (Sanskrit: क्षुण)[82] in ancient Indian texts and its fruit pulp contain saponins, a natural surfactant. The extract of Ksuna, creates a lather which Indian texts identify as phenaka (Sanskrit: फेनक),[83] leaves the hair soft, shiny and manageable. Other products used for hair cleansing were shikakai (
Acacia concinna), soapnuts (
Sapindus),
hibiscus flowers,[84][85] ritha (
Sapindus mukorossi) and arappu (Albizzia amara).[86]Guru Nanak, the founding prophet and the first
Guru of
Sikhism, made references to soapberry tree and soap in 16th century.[87] Washing of hair and body massage (champu) during a daily strip wash was an indulgence of early colonial traders in India. When they returned to Europe, they introduced their newly learnt habits, including the hair treatment they called shampoo.[88]
Yoga – Yoga as a physical, mental, and spiritual practice originated in
ancient India.[89]
Medicine
Angina pectoris – The condition was named "hritshoola" in ancient India and was described by
Sushruta (6th century BCE).[90]
Ayurvedic and
Siddha medicine – Ayurveda and Siddha are ancient systems of medicine practised in South Asia. Ayurvedic ideas can be found in the Hindu text[91] (mid-first millennium BCE). Ayurveda has evolved over thousands of years, and is still practised today. In an internationalised form, it can be thought of as a
complementary and alternative medicine. In village settings, away from urban centres, it is simply "medicine." The Sanskrit word आयुर्वेदः (āyur-vedaḥ) means "knowledge (veda) for longevity (āyur)".[92] Siddha medicine is mostly prevalent in South India, and is transmitted in Tamil, not Sanskrit, texts. Herbs and minerals are basic raw materials of the Siddha therapeutic system whose origins may be dated to the early centuries CE.[93][94]
Leprosy: Kearns & Nash (2008) state that the first mention of leprosy is described in the Indian medical treatise Sushruta Samhita (6th century BCE).[95] However, The Oxford Illustrated Companion to Medicine holds that the mention of leprosy, as well as ritualistic cures for it, were described in the Atharva-veda (1500–1200 BCE), written before the Sushruta Samhita.[96]
Lithiasis treatment – The earliest operation for treating lithiasis, or the formations of stones in the body, is also given in the Sushruta Samhita (6th century BCE).[97] The operation involved exposure and going up through the floor of the bladder.[97]
Visceral leishmaniasis, treatment of – The Indian (Bengali) medical practitioner
Upendranath Brahmachari (19 December 1873 – 6 February 1946) was nominated for the
Nobel Prize in Physiology or Medicine in 1929 for his discovery of 'ureastibamine (
antimonialcompound for treatment of
kala azar) and a new disease, post-kalaazar dermal leishmanoid.'[98] Brahmachari's cure for Visceral leishmaniasis was the urea salt of para-amino-phenyl stibnic acid which he called Urea Stibamine.[99] Following the discovery of Urea Stibamine, Visceral leishmaniasis was largely eradicated from the world, except for some underdeveloped regions.[99]
Ganja was used as herb for ayurverdic medicine development for last 2,000 years. The Sushruta Samhita, an ancient medical treatise, recommends cannabis plant extract for treating respiratory ailments and diarrhoea.
Otoplasty – Ear surgery was developed in
ancient India and is described in the medical compendium, the Sushruta Samhita (Sushruta's Compendium,
c. 500 AD). The book discussed otoplastic and other
plastic surgery techniques and procedures for correcting, repairing and reconstructing ears,
noses, lips, and genitalia that were amputated as criminal, religious, and military punishments. The ancient Indian
medical knowledge and plastic surgery techniques of the Sushruta Samhita were practiced throughout Asia until the late 18th century; the October 1794 issue of the contemporary British Gentleman's Magazine reported the practice of
rhinoplasty, as described in the Sushruta Samhita. Moreover, two centuries later, contemporary practices of otoplastic praxis were derived from the techniques and procedures developed and established in antiquity by Sushruta.[100][101]
Tonsillectomy – Tonsillectomies have been practiced for over 2,000 years, with varying popularity over the centuries.[102] The earliest mention of the procedure is in "Hindu medicine" from about 1000
BCE
Caesarian section – The
Sanskrit medical treatise Sushruta Samhita, composed in the early 1st millennium CE, mentions post-mortem caesarean sections.[103] The first available non-mythical record of a C-section is the mother of
Bindusara (born
c. 320 BC, ruled 298 –
c. 272 BC), the second
MauryanSamrat (
emperor) of India, accidentally consumed poison and died when she was close to delivering him.
Chanakya, Chandragupta's teacher and adviser, made up his mind that the baby should survive. He cut open the belly of the queen and took out the baby, thus saving the baby's life.[104]
Equestrianism
Toe stirrup – The earliest known manifestation of the stirrup, which was a toe loop that held the big toe was used in India in as early as 500 BCE[105] or perhaps by 200 BCE according to other sources.[106][107] This ancient stirrup consisted of a looped rope for the big toe which was at the bottom of a saddle made of fibre or leather.[107] Such a configuration made it suitable for the warm climate of most of India where people used to ride horses barefoot.[107] A pair of megalithic double bent iron bars with curvature at each end, excavated in
Junapani in the central Indian state of
Madhya Pradesh have been regarded as stirrups although they could as well be something else.[108] Buddhist carvings in the temples of Sanchi,
Mathura and the
Bhaja caves dating back between the 1st and 2nd century BCE figure horsemen riding with elaborate saddles with feet slipped under girths.[109][110][111]Sir John Marshall described the Sanchi relief as "the earliest example by some five centuries of the use of stirrups in any part of the world".[111] In the 1st century CE horse riders in northern India, where winters are sometimes long and cold, were recorded to have their booted feet attached to hooked stirrups.[106] However the form, the conception of the primitive Indian stirrup spread west and east, gradually evolving into the stirrup of today.[107][110]
Metallurgy, gems and other commodities
Iron working – Iron works were developed in India, around the same time as, but independently of,
Anatolia and the
Caucasus. Archaeological sites in India, such as
Malhar, Dadupur, Raja Nala Ka Tila and Lahuradewa in present-day
Uttar Pradesh show iron implements in the period between 1800 BCE—1200 BCE.[112] Early iron objects found in India can be dated to 1400 BCE by employing the method of
radiocarbon dating.
Spikes,
knives,
daggers,
arrow-heads,
bowls,
spoons,
saucepans,
axes,
chisels, tongs, door fittings etc. ranging from 600 BCE to 200 BCE have been discovered from several archaeological sites of India.[113] Some scholars believe that by the early 13th century BCE, iron smelting was practised on a bigger scale in India, suggesting that the date the technology's inception may be placed earlier.[112] In
Southern India (present day
Mysore) iron appeared as early as 11th to 12th centuries BCE; these developments were too early for any significant close contact with the northwest of the country.[114] In the time of
Chandragupta II Vikramaditya (375–413 CE), corrosion-resistant iron was used to erect the
Iron pillar of Delhi, which has withstood corrosion for over 1,600 years.[115]
Crucible steel – Perhaps as early as 300 BCE—although certainly by 200 BCE—high quality steel was being produced in southern India, by what Europeans would later call the crucible technique.[116] In this system, high-purity wrought iron, charcoal, and glass were mixed in a crucible and heated until the iron melted and absorbed the carbon.[116]
Dockyard – The world's earliest enclosed dockyard was built in the Harappan port city of
Lothal circa 2600 BC in Gujarat, India.[117][118]
Diamond drills – in the 12th century BCE or 7th century BCE, Indians not only innovated use of diamond tipped drills but also invented double diamond tipped drills for bead manufacturing.[119]
Diamond cutting and polishing – The technology of cutting and polishing diamonds was invented in India, Ratnapariksha, a text dated to 6th century talks about diamond cutting and Al-Beruni speaks about the method of using lead plate for diamond polishing in the 11th century CE.[120]
Draw bar – The draw bar was applied to sugar-milling, with evidence of its use at
Delhi in the
Mughal Empire by 1540, but possibly dating back several centuries earlier to the
Delhi Sultanate.[121]
Glassblowing – Rudimentary form of glass blowing from
Indian subcontinent is attested earlier than Western Asian counterparts(where it is attested not earlier than 1st century BCE) in the form of
Indo-Pacific beads which uses glass blowing to make cavity before being subjected to
tube drawn technique for bead making dated more than 2500 BP.[125][126] Beads are made by attaching molten glass gather to the end of a blowpipe, a bubble is then blown into the gather.[127] The glass blown vessels were rarely attested and were imported commodity in 1st millennium CE though.
Lost-wax casting – Metal casting by the
Indus Valley civilization began around 3500 BC in the
Mohenjodaro area,[128] which produced one of the earliest known examples of lost-wax casting, an Indian bronze figurine named the "
dancing girl" that dates back nearly 5,000 years to the
Harappan period (c. 3300–1300 BC).[128][129] Other examples include the buffalo, bull and dog found at Mohenjodaro and
Harappa,[130][129][131] two
copper figures found at the Harappan site
Lothal in the district of Ahmedabad of Gujarat,[128] and likely a covered cart with wheels missing and a complete cart with a driver found at
Chanhudaro.[130][131]
Seamless
celestial globe – Considered one of the most remarkable feats in
metallurgy, it was invented in India in between 1589 and 1590 CE.[132][133] Before they were rediscovered in the 1980s, it was believed by modern metallurgists to be technically impossible to produce metal globes without any
seams, even with modern technology.[133]
Tube drawn technology: Indians used tube drawn technology for glass bead manufacturing which was first developed in the 2nd century BCE.[137][138][127]
Wootz steel – Wootz steel is an ultra-high carbon steel and the first form of crucible steel manufactured by the applications and use of
nanomaterials in its microstructure and is characterised by its ultra-high carbon content exhibiting properties such as superplasticity and high impact hardness.[142] Archaeological and
Tamil languageliterary evidence suggests that this manufacturing process was already in existence in South India well before the common era, with
wootz steel exported from the
Chera dynasty and called Seric Iron in Rome, and later known as
Damascus steel in Europe.[143][144][145][146] Reproduction research is undertaken by scientists Dr. Oleg Sherby and Dr. Jeff Wadsworth and the
Lawrence Livermore National Laboratory have all attempted to create steels with characteristics similar to Wootz, but without success. J.D Verhoeven and Al Pendray attained some success in the reconstruction methods of production, proved the role of impurities of ore in the pattern creation, and reproduced Wootz steel with patterns microscopically and visually identical to one of the ancient blade patterns.[147]
Rain gauge – People living in
India began to record rainfall in 400 BCE.[148] The readings were correlated against expected growth. In the
Arthashastra, used for example in
Magadha, precise standards were set as to grain production. Each state storehouse was equipped with a rain gauge to classify land for taxation purposes.[149]
Incense clock – The incense clock is a timekeeping device used to measure minutes, hours, or days, incense clocks were commonly used at homes and temples in dynastic times. Although popularly associated with China the incense clock is believed to have originated in India, at least in its fundamental form if not function.[151][152] Early incense clocks found in China between the 6th and 8th centuries CE—the period it appeared in China all seem to have
Devanāgarī carvings on them instead of Chinese seal characters.[151][152] Incense itself was introduced to China from India in the early centuries CE, along with the spread of Buddhism by travelling monks.[153][154][155]Edward Schafer asserts that incense clocks were probably an Indian invention, transmitted to China, which explains the Devanāgarī inscriptions on early incense clocks found in China.[151]Silvio Bedini on the other hand asserts that incense clocks were derived in part from incense seals mentioned in
Tantric Buddhist scriptures, which first came to light in China after those scriptures from India were translated into Chinese, but holds that the time-telling function of the seal was incorporated by the Chinese.[152]
Standardisation – The oldest applications and evidence of standardisation come from the Indus Valley Civilisation in the 5th millennium BCE characterised by the existence of weights in various standards and categories as[156] well as the Indus merchants usage of a centralised weight and measure system. Small weights were used to measure luxury goods, and larger weights were used for buying bulkier items, such as food grains etc.[156] The weights and measures of the Indus civilisation also reached
Persia and
Central Asia, where they were further modified.[157]
A total of 558 weights were excavated from Mohenjodaro, Harappa, and
Chanhu-daro, not including defective weights. They did not find statistically significant differences between weights that were excavated from five different layers, each about 1.5 m in thickness. This was evidence that strong control existed for at least a 500-year period. The 13.7-g weight seems to be one of the units used in the Indus valley. The notation was based on the
binary and
decimal systems. 83% of the weights which were excavated from the above three cities were cubic, and 68% were made of
chert.[158]
Metal cylinder
rocket: In the 16th century,
Akbar was the first to initiate and use metal cylinder rockets known as bans, particularly against
war elephants, during the Battle of Sanbal.[160][better source needed]
India ink – Known in Asia since the third millennia BCE, and used in India since at least the 4th century BCE.[164]Masi, an early ink in India was an admixture of several chemical components.,[164] with the carbon black from which India ink is produced obtained by burning bones, tar, pitch, and other substances.[165][166][167] Documents dating to the 3rd century CE, written in
Kharosthi, with ink have been unearthed in
Xinjiang,
China.[168] The practice of writing with ink and a sharp pointed needle was common in ancient
South India.[169] Several
Jain sutras in India were compiled in ink.[170]
Philosophy and logic
Catuskoti (Tetralemma) – The four-cornered system of logical argumentation with a suite of four distinct functions that refers to a logical proposition P, with four possibilities that can arise. The tetralemma has many
logico-epistemological applications and has been made ample use of by the Indian philosopher
Nāgarjuna in the
Madhyamaka school. The tetralemma also features prominently in the Greek
skepticist school of
Pyrrhonism, the teachings of which are based on Buddhism. According to
Christopher I. Beckwith ,the founder of the Pyrrhonist school lived in India for 18 months and likely learned the language, which allowed him to carry these teachings to Greece.[171] However, other scholars, such as
Stephen Batchelor[172] and Charles Goodman[173] question Beckwith's conclusions about the degree of Buddhist influence on Pyrrho
Trairūpya – Trairūpya is a logical argument that contains three constituents which a logical ‘sign’ or ‘mark’ (linga) must fulfill to be 'valid source of knowledge' (
pramana):
It should be present in the case or object under consideration, the ‘subject-locus' (pakṣa)
It should be present in a ‘similar case’ or a homologue (sapakṣa)
It should not be present in any ‘dissimilar case’ or heterologue (vipakṣa)
When a ‘sign’ or ‘mark’ (linga) is identified, there are three possibilities: the sign may be present in all, some, or none of the sapakṣas. Likewise, the sign may be present in all, some or none of the vipakṣas. To identify a sign, we have to assume that it is present in the pakṣa, however; that is the first condition is already satisfied. Combining these, Dignaga constructed his ‘Wheel of Reason’ (Sanskrit:
Hetucakra).[174]
The seven predicate theory consists in the use of seven claims about sentences, each preceded by "arguably" or "conditionally" (syat), concerning a single object and its particular properties, composed of assertions and denials, either simultaneously or successively, and without contradiction. These seven claims are the following.
Arguably, it (that is, some object) exists (syad asty eva).
Arguably, it does not exist (syan nasty eva).
Arguably, it exists; arguably, it doesn't exist (syad asty eva syan nasty eva).
Arguably, it is non-assertible (syad avaktavyam eva).
Arguably, it exists; arguably, it is non-assertible (syad asty eva syad avaktavyam eva).
Arguably, it doesn't exist; arguably, it is non-assertible (syan nasty eva syad avaktavyam eva).
Arguably, it exists; arguably, it doesn't exist; arguably it is non-assertible (syad asty eva syan nasty eva syad avaktavyam eva).
Zero – Zero and its operation are first defined by (Hindu astronomer and mathematician) Brahmagupta in 628.[176] The Babylonians used a space, and later a zero glyph, in their written
Sexagesimal system, to signify the 'absent',[177] the Olmecs used a positional zero glyph in their
Vigesimal system, the Greeks, from
Ptolemy's
Almagest, in a
Sexagesimal system. The Chinese used a blank, in the written form of their decimal
Counting rods system. A dot, rather than a blank, was first seen to denote zero, in a decimal system, in the
Bakhshali manuscript.[178] The usage of the zero in the Bakhshali manuscript was dated from between 3rd and 4th centuries, making it the earliest known usage of a written zero, in a decimal place value system.[179]
Hindu number system – With
decimal place-value and a symbol for zero, this system was the ancestor of the widely used
Arabic numeral system. It was developed in the Indian subcontinent between the 1st and 6th centuries CE.[180][181]
Law of signs in multiplication – The earliest use of notation for negative numbers, as
subtrahend, is credited by scholars to the Chinese, dating back to the 2nd century BCE.[182] Like the Chinese, the Indians used negative numbers as subtrahend, but were the first to establish the "law of signs" with regards to the multiplication of positive and negative numbers, which did not appear in Chinese texts until 1299.[182] Indian mathematicians were aware of negative numbers by the 7th century,[182] and their role in mathematical problems of debt was understood.[183] Mostly consistent and correct rules for working with negative numbers were formulated,[184] and the diffusion of these rules led the Arab intermediaries to pass it on to Europe.,[183] for example (+)×(-)=(-),(-)×(-)=(+) etc.
Sign convention – Symbols, signs and mathematical notation were employed in an early form in India by the 6th century when the mathematician-astronomer Aryabhata recommended the use of letters to represent unknown quantities.[185] By the 7th century Brahmagupta had already begun using abbreviations for unknowns, even for multiple unknowns occurring in one complex problem.[185] Brahmagupta also managed to use abbreviations for square roots and cube roots.[185] By the 7th century fractions were written in a manner similar to the modern times, except for the bar separating the
numerator and the
denominator.[185] A dot symbol for
negative numbers was also employed.[185] The
Bakhshali Manuscript displays a cross, much like the modern '+' sign, except that it symbolised subtraction when written just after the number affected.[185] The '=' sign for equality did not exist.[185] Indian mathematics was transmitted to the Islamic world where this notation was seldom accepted initially and the scribes continued to write mathematics in full and without symbols.[186]
Modern
elementary arithmetic – Modum indorum or the method of the Indians for arithmetic operations was popularised by Al-Khwarizmi and Al-Kindi by means of their respective works such as in Al-Khwarizmi's on the Calculation with Hindu Numerals (ca. 825), On the Use of the Indian Numerals (ca. 830)[187] as early as the 8th and 9th centuries.They, amongst other works, contributed to the diffusion of the Indian system of arithmetic in the Middle-East and the West.The significance of the development of the positional number system is described by the French mathematician Pierre Simon Laplace (1749–1827) who wrote:
"It is India that gave us the ingenuous method of expressing all numbers by the means of ten symbols, each symbol receiving a value of position, as well as an absolute value; a profound and important idea which appears so simple to us now that we ignore its true merit, but its very simplicity, the great ease which it has lent to all computations, puts our arithmetic in the first rank of useful inventions, and we shall appreciate the grandeur of this achievement when we remember that it escaped the genius of Archimedes and Apollonius, two of the greatest minds produced by antiquity."
Chakravala method – The Chakravala method, a cyclic algorithm to solve
indeterminatequadratic equations is commonly attributed to
Bhāskara II, (c. 1114 – 1185 CE)[188][189][190] although some attribute it to
Jayadeva (c. 950~1000 CE).[191] Jayadeva pointed out that Brahmagupta's approach to solving equations of this type would yield infinitely large number of solutions, to which he then described a general method of solving such equations.[192] Jayadeva's method was later refined by Bhāskara II in his Bijaganita treatise to be known as the Chakravala method, chakra (derived from cakraṃ चक्रं) meaning 'wheel' in
Sanskrit, relevant to the cyclic nature of the algorithm.[192][193] With reference to the Chakravala method, E. O. Selenuis held that no European performances at the time of Bhāskara, nor much later, came up to its marvellous height of mathematical complexity.[188][192][194]
Trigonometric functions – The
trigonometric functions sine and versine originated in
Indian astronomy along with the cosine and inversine , adapted from the full-chord Greek versions (to the modern half-chord versions). They were described in detail by
Aryabhata in the late 5th century, but were likely developed earlier in the
Siddhantas, astronomical treatises of the 3rd or 4th century.[195][196] Later, the 6th-century astronomer
Varahamihira discovered a few basic trigonometric formulas and identities, such as sin^2(x) + cos^2(x) = 1.[197]
Madhava series – The infinite series for π and for the trigonometric
sine,
cosine, and
arctangent is now attributed to Madhava of Sangamagrama (c. 1340 – 1425) and his Kerala school of astronomy and mathematics.[199][200] He made use of the series expansion of to obtain an infinite series expression for π.[199] Their rational approximation of the error for the finite sum of their series are of particular interest. They manipulated the error term to derive a faster converging series for π.[201] They used the improved series to derive a rational expression,[201] for π correct up to eleven decimal places, i.e..[202][203] Madhava of Sangamagrama and his successors at the
Kerala school of astronomy and mathematics used geometric methods to derive large sum approximations for sine, cosine, and arctangent. They found a number of special cases of series later derived by Brook Taylor series. They also found the second-order Taylor approximations for these functions, and the third-order Taylor approximation for sine.[204][205][206]
Power series – The Kerala school of astronomy and mathematics or the Kerala school was a school of mathematics and astronomy founded by Madhava of Sangamagrama in Tirur, Malappuram, Kerala, India. Their work, completed two centuries before the invention of calculus in Europe, provided what is now considered the first example of a power series (apart from geometric series). However, they did not formulate a systematic theory of differentiation and integration.[207]
Finite difference
interpolation – The Indian mathematician
Brahmagupta presented what is possibly the first instance[208][209] of finite difference interpolation around 665 CE.[210]
Algebraic abbreviations – The mathematician
Brahmagupta had begun using abbreviations for unknowns by the 7th century.[185] He employed abbreviations for multiple unknowns occurring in one complex problem.[185] Brahmagupta also used abbreviations for
square roots and
cube roots.[185]
Combinatorics – the
Bhagavati Sutra had the first mention of a combinatorics problem; the problem asked how many possible combinations of tastes were possible from selecting tastes in ones, twos, threes, etc. from a selection of six different tastes (sweet, pungent, astringent, sour, salt, and bitter). The Bhagavati is also the first text to mention the
choose function.[216] In the second century BC,
Pingala included an enumeration problem in the
Chanda Sutra (also Chandahsutra) which asked how many ways a six-syllable metre could be made from short and long notes.[217][218] Pingala found the number of metres that had long notes and short notes; this is equivalent to finding the
binomial coefficients.
Jain texts define five different types of
infinity – the infinite in one direction, the infinite in two directions, the infinite in area, the infinite everywhere, and the infinite perpetually.[219] and the Satkhandagama
Fibonacci numbers – This sequence was first described by
Virahanka (c. 700 CE), Gopāla (c. 1135), and
Hemachandra (c. 1150),[220] as an outgrowth of the earlier writings on Sanskrit prosody by
Pingala (c. 200 BCE).
Pascal's triangle – Described in the 6th century CE by
Varahamihira[197] and in the 10th century by
Halayudha,[221] commenting on an obscure reference by
Pingala (the author of an earlier work on prosody) to the "Meru-prastaara", or the "Staircase of Mount Meru", in relation to binomial coefficients. (It was also independently discovered in the 10th or 11th century in Persia and China.)
Integral solution to
Pell's equation – About a thousand years before
Pell's time, Indian scholar Brahmagupta (598–668 CE) was able to find integral solutions to vargaprakṛiti (Pell's equation):[222][223] where N is a non-square integer, in his
Brâhma-sphuṭa-siddhânta treatise.[224]
Ardhacheda – Earlier than
Michael Stifel, the 8th century
Jain mathematician
Virasena is credited with a precursor to the binary logarithm. Virasena's concept of ardhacheda has been defined as the number of times a given number can be divided evenly by two. This definition gives rise to a function that coincides with the binary logarithm on the powers of two,[225] but it is different for other integers, giving the
2-adic order rather than the logarithm.[226]
Kuṭṭaka – The Kuṭṭaka algorithm has much similarity with and can be considered as a precursor of the modern day
extended Euclidean algorithm. The latter algorithm is a procedure for finding integers x and y satisfying the condition ax + by =
gcd(a, b).[227]
Diamond mining and diamond tools: Diamonds were first recognised and mined in central India,[231][232][233] where significant alluvial deposits of the stone could then be found along the rivers
Penner,
Krishna and
Godavari. It is unclear when diamonds were first mined in India, although estimated to be at least 5,000 years ago.[234] India remained the world's only source of diamonds until the discovery of diamonds in Brazil in the 18th century.[235][236][237]Golconda served as an important centre for diamonds in
central India.[238] Diamonds then were exported to other parts of the world, including Europe.[238] Early references to diamonds in India come from
Sanskrit texts.[239] The Arthashastra of
Kautilya mentions diamond trade in India.[237]Buddhist works dating from the 4th century BCE mention it as a well-known and precious stone but don't mention the details of diamond cutting.[231] Another Indian description written at the beginning of the 3rd century describes strength, regularity, brilliance, ability to scratch metals, and good refractive properties as the desirable qualities of a diamond.[231] A Chinese work from the 3rd century BCE mentions: "Foreigners wear it [diamond] in the belief that it can ward off evil influences".[231] The Chinese, who did not find diamonds in their country, initially used diamonds as a "jade cutting knife" instead of as a jewel.[231]
Zinc mining and
medicinal zinc – Zinc was first smelted from zinc ore in India.[240] Zinc mines of Zawar, near
Udaipur,
Rajasthan, were active during early Christian era.[241][242] There are references of medicinal uses of zinc in the
Charaka Samhita (300 BCE).[243] The
Rasaratna Samuccaya which dates back to the Tantric period (
c. 5th – 13th century CE) explains the existence of two types of ores for zinc metal, one of which is ideal for metal extraction while the other is used for medicinal purpose.[243][244] India was to melt the first derived from a long experience of the old alchemy zinc by the distillation process, an advanced technique. The ancient Persians had also tried to reduce zinc oxide in an open stove, but had failed. Zawar in Tiri valley of Rajasthan is the first known old zinc smelting site in the world.[citation needed] The distillation technique of zinc production dates back to the 12th century CE and is an important contribution of India in the world of science.
Space
Earth's orbit (
Sidereal year): The
Hindu cosmological time cycles explained in the Surya Siddhanta (c.600 CE), give the average length of the sidereal year (the length of the Earth's revolution around the Sun) as 365.2563627 days, which is only a negligible 1.4 seconds longer than the modern value of 365.256363004 days.[245][failed verification][nb 1]
Preliminary concept of gravity – The concept of gravity as attracting objects towards Earth was already known to Greek scholars,
Brahmagupta in sixth century CE also described gravity as an attractive force, using the term gurutvākarṣaṇa in which heavier objects attract towards the earth.[247][248][249]
Periodicity of comets – Indian astronomers by the 6th century CE believed that comets were apparitions that re-appeared periodically. This was the view expressed in the 6th century by the astronomers
Varahamihira and Bhadrabahu, and the 10th-century astronomer
Bhattotpala listed the names and estimated periods of certain comets, but it is unfortunately not known how these figures were calculated or how accurate they were.[250]
Punch (drink) a
mixed drink containing fruits or fruit juice that can be both alcoholic and non-alcoholic originated in the Indian subcontinent before making its way into England by passage through the
East India Company.[254] This beverage is very popular among the world with many varietal flavors and brands throughout the
beverage industry.
Hookah or water pipe: according to Cyril Elgood (PP.41, 110), the physician Irfan Shaikh, at the court of the Mughal emperor
Akbar I (1542–1605) invented the Hookah or water pipe used most commonly for smoking
tobacco.[255][256][257][258]
Modern India
Medicine
Urea stibamine – Sir
Upendranath Brahmachari synthesised
urea-stibamine (carbostibamide) in 1922 and determined that it was an effective treatment for
kala-azar (visceral leishmaniasis).
post-kala-azar dermal leishmaniasis – n 1922, Brahmachari also discovered a new, deadly form of
leishmaniasis. He called it dermal leishmanoid, marked by the appearance of sudden eruptions on the face of the patients without fever or other complaints. He observed it as a disease in partially cured cases of kala-azar, along with those who had no history of the disease at all.[259] It has since been termed as
post-kala-azar dermal leishmaniasis.
In vitro fertilisation – the second successful birth of a 'test tube baby' occurred in India just 67 days after Louise Brown was born. The girl, named Durga, was conceived in vitro using a method developed independently by
Subhash Mukhopadhyay, a physician and researcher from
Kolkata. Mukhopadhyay had been performing experiments on his own with primitive instruments and a household refrigerator.[261] However, state authorities prevented him from presenting his work at scientific conferences,[262] and it was many years before Mukhopadhyay's contribution was acknowledged in works dealing with the subject.[263][better source needed]
Microwave communication – The first public demonstration of microwave transmission was made by
Jagadish Chandra Bose, in Calcutta, in 1895, two years before a similar demonstration by Marconi in England, and just a year after
Oliver Lodge's commemorative lecture on Radio communication, following Hertz's death. Bose's revolutionary demonstration forms the foundation of the technology used in mobile telephony, radars, satellite communication, radios, television broadcast, WiFi, remote controls and countless other applications.[267][268]
Low Mobility Large cell (LMLC), is a feature of 5G and is designed to enhance the signal transmission range of a basestation several times, helping service providers cost-effectively expand coverage in rural areas.[269]
Julia is a high-level, dynamic programming language. Its features are well suited for numerical analysis and computational science.
Viral B. Shah an Indian computer scientist contributed to the development of the language in Bangalore while also actively involved in the initial design of the Aadhaar project in India using
India Stack.[273]
RISC-V ISA (microprocessor) implementations (a US standard, not from India, but some implementations are such as those below):
SHAKTI – Open Source, Bluespec System
Verilog definitions, for FinFET implementations of the ISA, have been created at
IIT Madras, and are hosted on
GitLab.[276]
VEGA Microprocessors – India's first indigenous 64-bit, superscalar, out-of-order, multi-core RISC-V Processor design, developed by
C-DAC.[277]
File Transfer Protocol (FTP) – A standard communication protocol used for the transfer of computer files from a server to a client on a computer network. FTP is built on a client–server model architecture using separate control and data connections between the client and the server.
Abhay Bhushan is the author of the File Transfer Protocol (which he started working on while he was a student at IIT-Kanpur) and the early versions of email protocols[278]
Construction, civil engineering and architecture
CO2-treated-C&D, researchers at the Centre for Sustainable Technologies (CST), IISc, are exploring ways to store carbon dioxide from industrial flue gas in excavated soil in Construction and Demolition (C&D) waste. the effect of injecting carbon dioxide gas into clayey soil—typically excavated from construction sites. This resulted in better stabilization of clay by cement and lime, and reduced the surface area, pore volume and lime reactivity of clay in soil, thereby improving the bulk engineering performance of the material.[279][280]
Rib & spine/Spine & Wing technique,
NHAI has developed a flyover design which allows to save cost, time, minimum material usage and allows light under the flyover using the same technique.
(I)-TM Tunneling technique:(I)-TM as Himalayan tunnelling method for tunnelling through the Himalayan geology to build tunnels in Jammu and Kashmir. Engineers decided to provide rigid supports using 'ISHB' as against the lattice girder method used in the New Austrian Tunnelling Method.ISHB uses nine-metre pipes in the mountains. It is called pipe roofing. Engineers made an umbrella using these perforated poles and filled them with PU grout.[281][282][283]
Plastic road are made entirely of plastic or of composites of plastic with other materials. Plastic roads are different from standard roads in the respect that standard roads are made from asphalt concrete, which consists of mineral aggregates and asphalt. Most plastic roads sequester
plastic waste within the asphalt as an aggregate. Plastic roads first developed by
Rajagopalan Vasudevan in 2001[284][285][286]
Finance and banking
Payments bank is an Indian new model of banks conceptualised by the Reserve Bank of India (RBI) without issuing credit.
Paleontology
In 2024, one of the longest snakes to ever exist,
Vasuki indicus, was discovered by scientists from the
Indian Institute of Technology. The snake was estimated to be between 10.9 and 15.2 metres in length and lived 47 million years ago. The fossilised vertebrae of Vasuki indicus were discovered in a lignite mine in
Gujarat. It was likely a slow moving predator who killed its prey through constriction.[287]
In 2018, scientists from the
Geological Survey of India and the Indian Institute of Technology discovered the fossil remains of a previously unknown dinosaur species in the
Thar Desert region of Jaisalmer, Rajasthan. The dinosaur is named
Tharosaurus indicus, after the Thar Desert and India.[288]
Genetics
Amrapali mango – A named mango cultivar introduced in 1971 by Dr. Pijush Kanti Majumdar at the Indian Agriculture Research Institute in Delhi.
Mynvax – The world's first "warm" COVID-19 vaccine, developed by
IISc, capable of withstanding 37 °C (99 °F) for a month and neutralise all coronavirus variants of concern.[289]
ZyCoV-D vaccine – The world's first DNA-based COVID-19 vaccine.[290]
Metallurgy, manufacturing, and industry
Carbon nitride solar reactor – In September 2021, A team from the
Institute of Nano Science and Technology (INST), Mohali, has fabricated a prototype reactor which operates under natural sunlight to produce hydrogen at a scale of around 6.1 litres in eight hours. They have used an earth-abundant chemical called carbon nitrides as a catalyst for the purpose.[291][292]
High ash coal gasification (coal to methanol) – The central government gave the country world's first 'coal to methanol' (CTM) plant built by the
Bharat Heavy Electricals Limited (BHEL). The plant was inaugurated in BHEL's Hyderabad unit, The pilot project is the first that uses the gasification method for converting high-ash coal into methanol. Handling of high ash and heat required to melt this high amount of ash is a challenge in the case of Indian coal, which generally has high ash content. Bharat Heavy Electricals Limited has developed the fluidized bed gasification technology suitable for high ash Indian coals to produce syngas and then convert syngas to methanol with 99% purity.[293]
Controlled shunt reactor – In 2002,
Bharat Heavy Electricals Limited has successfully developed a first-of-its-kind in the world device for improving power transfer capability and reducing transmission losses in the country's highest rating (400 kV) transmission lines.The device is called Controlled Shunt Reactor.[294][295]
DMR grade steel – For several high-technology applications, such as military hardware and aerospace, need to possess ultrahigh strength (UHS; minimum yield strength of 1380 MPa (200 ksi)) coupled with high fracture toughness in order to meet the requirement of minimum weight while ensuring high reliability.
JD-1 alloy – A special lightweight alloy developed by
Jindal Defence with a minimum guaranteed hardness of 500 HB. It can be used in aerospace, small arms, and engineering solutions. It is mainly used in armoured jacket.
Sorption-enhanced steam methane reforming (SESMR) – In April 2022, the scientists from CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad developed a fluidized bed reactor (FBR) facility in Hyderabad to perform sorption enhanced steam methane reforming (SESMR) to achieve clean hydrogen in its purest form. The team of scientists have designed a hybrid material to simulate capturing carbon dioxide in-situ (onsite) and converting it into clean hydrogen from non-fuel grade bioethanol.[296]
Spray-drying buffalo milk – The collective consensus of dairy experts worldwide was that buffalo milk could not be spray-dried due to its high fat content. Harichand Megha Dalaya & his invention of the spray dry equipment, led to the world's first buffalo milk spray-dryer, at Amul Dairy in Gujarat.
Jackal steel – An advanced grade high-strength, low-alloy steel. The technology of Jackal steel has been passed on to Steel Authority of India Limited (SAIL) and MIDHANI for its bulk production.
High-Rise Pantograph – The new-design world record pantograph, developed completely in-house for use in DFC & other freight routes with height of 7.5 metres (25 ft).[297]
Commercial
CCU plant: Tuticorin Alkali Chemicals and Fertilizers Limited (TFL) partnered with Carbon Clean to create the world's first fully commercial CCU plant. The 10 MW facility captures coal-fired boiler flue gas and uses it to deliver industrial quality CO2. The 10 MW facility captures coal-fired boiler flue gas and uses it to deliver industrial quality CO2.[298] The technology has been developed by Carbon Clean Solutions, headquartered in London – a start-up by two Indian engineers focusing on carbon dioxide separation technology.There are many chemicals exported out of India where CO2 is the raw material.[299]
Triple-stack container freight train[300][301] – In order to ensure new streams of traffic and commodities and to bring about a modal shift, the DFC is undertaking trials for running smaller than usual containers, known as dwarf containers (where the container height is lower by 660 mm than normal containers), in triple-stack formation to further improve the profitability of train operations. It may be possible to run these as double-stack on conventional routes and triple-stack on routes with high-rise OHE, once the trials are successfully completed.[302]
Metrology
Crescograph – The crescograph, a device for measuring growth in plants, was invented in the early 20th century by the Bengali scientist Sir
Jagadish Chandra Bose.[303][304]
Bipyrazole Organic Crystals, the piezoelectric molecules developed by
IISER scientists recombine following mechanical fracture without any external intervention, autonomously self-healing in milliseconds with crystallographic precision.[307]
Single-crystalline Scandium Nitride, that has the ability to convert infrared light into energy, Scientists based in Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bengaluru have discovered a novel material that can emit, detect, and modulate infrared light with high efficiency making it useful for solar and thermal energy harvesting and for optical communication devices.[308][309]
Indian Ocean Dipole is an unusual pattern in the ocean-atmosphere system of the equatorial Indian Ocean that influences the monsoon and can offset the adverse impact of El Nino. It is typically characterized by cooler than normal eastern equatorial Indian Ocean and warmer than normal west and unusual equatorial easterly winds. It was discovered in Centre for Atmospheric And Oceanic Sciences,
IISc. team led by NH Saji in 1999.[310]
Solution combustion synthesis (SCS) was accidentally discovered in 1988 at Indian Institute of Science (IISc), Bengaluru, India. SCS involves an exothermic redox chemical reaction between an oxidizer like metal nitrate and a fuel in an aqueous medium.[311]
Electrically Excited Synchronous Motor (EESM) or Rare earth free motor: In 2021 deep-tech startup Chara Technologies has built scalable, cloud-controlled electric vehicle motors free of toxic rare-earth metals, thus cutting a massive dependency on imports to accelerate electric mobility in India.[312][313]
Weapon systems
ATAGS – Bharat Forge and the DRDO has developed world's first electric artillery gun[314]
Rifle-rated ballistic helmet,
MKU has developed what it bills as "a first-of-its-kind rifle-rated ballistic helmet", MKU states that the Kavro Doma 360 is "the first anti-rifle helmet in the world that does not have bolts or any metal parts"[315]
Critical Situation Response Vehicle (CSRV) – The Central Reserve Police Force (CRPF) has made and inducted a bomb/bulletproof armoured vehicle. The latest all-terrain highly sophisticated vehicle 'CSRV' has given a shot in the arm to the Central Reserve Police Force engaged in counter-terror operations.
E-bomb – The Defence Research and Development Organisation (DRDO) has been developing an e-bomb which will emit electromagnetic shock waves that destroy electronic circuits and communication networks of enemy force.[316] The tow bodies in Lakshya-2 Weapon Delivery Configuration carry High Energy Weapon Payload.[317]
Phosphoric Acid Fuel Cell air-independent propulsion (PAFC AIP) is a 270 kilowatt phosphoric acid fuel cell (PAFC) air-independent propulsion (AIP) system to power the Kalvari-class submarines is developed by the
Naval Materials Research Laboratory of Indian Defence Research and Development Organisation in collaboration with
Larsen & Toubro and
Thermax. The patent is owned by
DRDO. Its application is considered to be wide and it can also power ships in future.[318]
Indigenisation and improvements
Helmet AC - Featuring a plastic top and built-in-fan-like structure, the AC helmets are powered by a battery pack, which is worn by the traffic police officials on their waist. These helmets work for around 8 hours on a single full charge.[319]
CNG car/vehicle –
Bajaj Auto launched the first 'commercial' lot of its CNG (Compressed Natural Gas) autorickshaws in Delhi on 29 May 2000.
Digital rupee (e₹) or eINR or e-rupee is a tokenised digital version of the Indian rupee, to be issued by the Reserve Bank of India (RBI) as a central bank digital currency (CBDC). Digital Rupee is using blockchain distributed-ledger technology. Digital rupee users to hit 50,000 by Jan-end on better acceptance.[320]
MD-15 is a fuel grade in which Methanol is blended with diesel. Research Design and Standards Organisation (RDSO), in collaboration with the Indian Oil Corporation Ltd (IOCL), has developed a special cost-effective fuel that would not only minimize IR's dependency on diesel, but will also be emit fewer pollutants. IOCL developed the composition, adding 14% additives (developed indigenously by IOCL) along with 71% mineral diesel, 15% methanol. MD-15 fuelled engine has shown superior performance, emission and combustion characteristics than the mineral diesel fuelled engine.[321][322]
Unified Payments Interface – An instant real-time payment system developed by National Payments Corporation of India (NPCI) facilitating person-to-merchant (P2M) transactions through inter-bank peer-to-peer (P2P) mechanism. UPI doesn't need an internet connection for financial transactions, and cardless ATM transactions can also occur using UPI. UPI is not an alternative to a wallet, but more of a solution to the money printing problem.
Basu's theorem – The Basu's theorem, a result of
Debabrata Basu (1955) states that any complete sufficient statistic is independent of any ancillary statistic.[326][327]
Magical Indian Math discovery: Numbers 495 and 6174. The Indian mathematician Dattaraya Ramchandra Kaprekar discovered the number 6174 is reached after repeatedly subtracting the smallest number from the largest number that can be formed from any four digits not all the same. The number 495 is similarly reached for three digits number.
Kosaraju's algorithm is a linear time algorithm to find the strongly connected components of a directed graph. Aho, Hopcroft and Ullman credit it to S. Rao Kosaraju and Micha Sharir. Kosaraju suggested it in 1978.
Shrikhande graph –
Graph invented by the Indian mathematician S.S. Shrikhande in 1959.
Sciences
Ammonium nitrite, synthesis in pure form –
Prafulla Chandra Roy synthesised NH4NO2 in its pure form, and became the first scientist to have done so.[331] Prior to Ray's synthesis of Ammonium nitrite it was thought that the compound undergoes rapid thermal decomposition releasing nitrogen and water in the process.[331]
Ashtekar variables – In theoretical physics, Ashtekar (new) variables, named after
Abhay Ashtekar who invented them, represent an unusual way to rewrite the metric on the three-dimensional spatial slices in terms of a
SU(2)gauge field and its complementary variable. Ashtekar variables are the key building block of
loop quantum gravity.
Bhatnagar-Mathur Magnetic Interference Balance: Invented jointly by
Shanti Swarup Bhatnagar and K.N. Mathur in 1928, the so-called 'Bhatnagar-Mathur Magnetic Interference Balance' was a modern instrument used for measuring various magnetic properties.[332] The first appearance of this instrument in Europe was at a
Royal Society exhibition in London, where it was later marketed by British firm Messers Adam Hilger and Co, London.[332]
Bhabha scattering – In 1935, Indian nuclear physicist
Homi J. Bhabha published a paper in the Proceedings of the Royal Society, Series A, in which he performed the first calculation to determine the cross section of electron-positron scattering.[333] Electron-positron scattering was later named Bhabha scattering, in honour of his contributions in the field.[333]
Bose–Einstein statistics,
condensate – On 4 June 1924 the Indian physicist
Satyendra Nath Bose mailed a short manuscript to
Albert Einstein entitled
Planck's Law and the Light Quantum Hypothesis seeking Einstein's influence to get it published after it was rejected by the prestigious journal Philosophical Magazine.[334] The paper introduced what is today called Bose statistics, which showed how it could be used to derive the Planck blackbody spectrum from the assumption that light was made of
photons.[334][335] Einstein, recognizing the importance of the paper translated it into German himself and submitted it on Bose's behalf to the prestigious Zeitschrift für Physik.[334][335] Einstein later applied Bose's principles on particles with mass and quickly predicted the Bose-Einstein condensate.[335][336]
Mahalanobis distance – Introduced in 1936 by the Indian (Bengali) statistician
Prasanta Chandra Mahalanobis (29 June 1893 – 28 June 1972), this distance measure, based upon the correlation between variables, is used to identify and analyze differing pattern with respect to one base.[339]
Mercurous nitrite – The compound mercurous nitrite was discovered in 1896 by the Bengali chemist Prafulla Chandra Roy, who published his findings in the Journal of the Asiatic Society of Bengal.[331] The discovery contributed as a base for significant future research in the field of chemistry.[331]
Raman effect – The Encyclopædia Britannica (2008) reports: "change in the wavelength of light that occurs when a light beam is deflected by molecules. The phenomenon is named for
Sir Chandrasekhara Venkata Raman, who discovered it in 1928. When a beam of light traverses a dust-free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident (incoming) beam. Most of this scattered light is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light; its presence is a result of the Raman effect."[341]
Periodicity in Nuclear Properties: A sharp pattern is discovered by an Indian researcher regarding the nuclear properties of chemical elements. The remarkable deviations are noticed near the magic numbers.[343]
Process of formation of the E layer of the ionosphere and night sky luminiscence: Discovered by the Indian physicist, Sisir Kumar Mitra.[344]
Space
Lunar water – Although the presence of water ice on the Moon has been conjectured by various scientists since the 1960s, inconclusive evidence of free water ice had also been identified. The first incontrovertible evidence of water on the Moon was provided by the payload Chace carried by the
Moon Impact Probe released by
Chandrayaan-1 in 2009,[345][346][347] confirmed and established by
NASA.[348]
^Greek astronomer
Hipparchus (c. 190 – c. 120 BC) centuries earlier also calculated sidereal year to be 365 + 1/4 + 1/144 days (365.25694... days ie., 365 days 6 hours 10 min) .[246]
^Zvelebil, Kamil V. (1996). The Siddha Quest for Immortality. Oxford: Mandrake of Oxford.
ISBN978-1-869928-43-8.
^Scharf, Hartmut (1999). "The Doctrine of the Three Humors in Traditional Indian Medicine and the Alleged Antiquity of Tamil Siddha Medicine". Journal of the American Oriental Society. 119 (4): 609–629.
doi:
10.2307/604837.
JSTOR604837.
^Lurie S (April 2005). "The changing motives of cesarean section: from the ancient world to the twenty-first century". Archives of Gynecology and Obstetrics. 271 (4): 281–285.
doi:
10.1007/s00404-005-0724-4.
PMID15856269.
S2CID26690619.
^Marco Ceccarelli (2000). International Symposium on History of Machines and Mechanisms: Proceedings HMM Symposium. Springer.
ISBN0-7923-6372-8. pp 218
^I. M. Drakonoff (1991). Early Antiquity. University of Chicago Press.
ISBN0-226-14465-8. pp 372
^For the etching technique, see MacKay, Ernest (1925). "Sumerian Connexions with Ancient India". The Journal of the Royal Asiatic Society of Great Britain and Ireland (4): 699.
JSTOR25220818.
^
abAgrawal, D. P. (2000). Ancient Metal Technology and Archaeology of South Asia. A Pan-Asian Perspective. New Delhi: Aryan Books International.
ISBN978-81-7305-177-7.
^
abKenoyer, J. M. & H. M.-L. Miller, (1999). Metal Technologies of the Indus Valley Tradition in Pakistan and Western India., in The Archaeometallurgy of the Asian Old World., ed. V. C. Pigott. Philadelphia: The University of Pennsylvania Museum.
^
abSavage-Smith, Emilie (1985). Islamicate Celestial Globes: Their history, Construction, and Use. Smithsonian Institution Press, Washington, D.C.
^Satyawadi, Sudha (1 July 1994). Proto-Historic Pottery of Indus Valley Civilization; Study of Painted Motif. D.K. Printworld. p. 324.
ISBN978-8124600306.
^Blackman, M. James; et al. (1992). The Production and Distribution of Stoneware Bangles at Mohenjo-daro and Harappa as Monitored by Chemical Characterization Studies. Madison, WI, USA: Prehistory Press. pp. 37–44.
^Mark Kenoyer, Jonathan (1998). Ancient Cities of the Indus Valley Civilization. Oxford University Press. p. 260.
^Gwinnett, A. John; Gorelick, L. (1993). "Beads, Scarabs, and Amulets: Methods of Manufacture in Ancient Egypt". Journal of the American Research Center in Egypt. 30: 125–132.
doi:
10.2307/40000232.
ISSN0065-9991.
JSTOR40000232.
^Roddam Narasimha (1985),
Rockets in Mysore and Britain, 1750–1850 A.D.Archived 27 September 2007 at the
Wayback Machine, National Aeronautical Laboratory and Indian Institute of Science"Hyder Ali, prince of Mysore, developed war rockets with an important change: the use of metal cylinders to contain the combustion powder. Although the hammered soft iron he used was crude, the bursting strength of the container of black powder was much higher than the earlier paper construction. Thus a greater internal pressure was possible, with a resultant greater thrust of the propulsive jet. The rocket body was lashed with leather thongs to a long bamboo stick. Range was perhaps up to three-quarters of a mile (more than a kilometre). Although individually these rockets were not accurate, dispersion error became less important when large numbers were fired rapidly in mass attacks. They were particularly effective against cavalry and were hurled into the air, after lighting, or skimmed along the hard dry ground. Hyder Ali's son,
Tippu Sultan, continued to develop and expand the use of rocket weapons, reportedly increasing the number of rocket troops from 1,200 to a corps of 5,000. In battles at
Seringapatam in 1792 and 1799 these rockets were used with considerable effect against the British." – Encyclopædia Britannica (2008). rocket and missile.
^Stephen Batchelor "Greek Buddha: Pyrrho's encounter with early Buddhism in central Asia", Contemporary Buddhism, 2016, pp 195–215
^Charles Goodman, "Neither Scythian nor Greek: A Response to Beckwith's Greek Buddha and Kuzminski's "Early Buddhism Reconsidered"", Philosophy East and West, University of Hawai'i Press Volume 68, Number 3, July 2018 pp. 984–1006
^Ganeri, Jonardon & Tiwari, Heeraman (eds.), (1988). The Character of Logic in India. Albany, NY, USA: State University of New York Press.
ISBN0-7914-3739-6 (HC:acid free), p.7-8
^September 2017, Jessie Szalay-Live Science Contributor 18 (18 September 2017).
"Who Invented Zero?". livescience.com. Retrieved 18 May 2021. {{
cite web}}: |first= has generic name (
help)CS1 maint: numeric names: authors list (
link)
^Nils-Bertil Wallin (19 November 2002).
"The History of Zero". Yale Center for the Study of Globalization. Archived from
the original on 25 August 2016. Retrieved 26 December 2011.
"Geometry, and its branch trigonometry, was the mathematics Indian astronomers used most frequently. In fact, the Indian astronomers in the third or fourth century, using a pre-Ptolemaic Greek table of chords, produced tables of sines and versines, from which it was trivial to derive cosines. This new system of trigonometry, produced in India, was transmitted to the Arabs in the late eighth century and by them, in an expanded form, to the Latin West and the Byzantine East in the twelfth century."
^Van Brummelen, Glen (2009). The mathematics of the heavens and the earth: the early history of trigonometry. Princeton University Press. p. 329.
ISBN9780691129730. (p.111)
^Datta, Bibhutibhusan; Singh, Awadhesh Narayan (2019). "Use of permutations and combinations in India". In Kolachana, Aditya; Mahesh, K.; Ramasubramanian, K. (eds.). Studies in Indian Mathematics and Astronomy: Selected Articles of Kripa Shankar Shukla. Sources and Studies in the History of Mathematics and Physical Sciences. Springer Singapore. pp. 356–376.
doi:
10.1007/978-981-13-7326-8_18.
ISBN978-981-13-7325-1.
S2CID191141516.. Revised by K. S. Shukla from a paper in Indian Journal of History of Science 27 (3): 231–249, 1992,
MRMR1189487. See p. 363.
^Rina Shrivastva (1999).
"Smelting furnaces in Ancient India"(PDF). Indian Journal of History & Science,34(1), Digital Library of India. Archived from
the original(PDF) on 25 April 2012. Retrieved 4 November 2011.
^De, S. N.; Sarkar, J. K.; Tribedi, B. P. (1951). "An experimental study of the action of cholera toxin". The Journal of Pathology and Bacteriology. 63 (4): 707–717.
doi:
10.1002/path.1700630417.
PMID14898376.
Adas, Michael (January 2001). Agricultural and Pastoral Societies in Ancient and Classical History. Temple University Press.
ISBN1-56639-832-0.
Addington, Larry H. (1990). The Patterns of War Through the Eighteenth Century (Illustrated edition). Indiana: Indiana University Press.
ISBN0-253-20551-4.
Alter, J. S. in "Kabaddi, a national sport of India". Dyck, Noel (2000). Games, Sports and Cultures. Berg Publishers:
ISBN1-85973-317-4.
Arensberg, Conrad M. & Niehoff, Arthur H. (1971). Introducing Social Change: A Manual for Community Development (second edition). New Jersey: Aldine Transaction.
ISBN0-202-01072-4
Augustyn, Frederick J. (2004). Dictionary of toys and games in American popular culture. Haworth Press.
ISBN0-7890-1504-8.
Azzaroli, Augusto (1985). An Early History of Horsemanship. Massachusetts: Brill Academic Publishers.
ISBN90-04-07233-0.
Baber, Zaheer (1996). The Science of Empire: Scientific Knowledge, Civilization, and Colonial Rule in India. State University of New York Press.
ISBN0-7914-2919-9.
Bag, A. K. (2005). "Fathullah Shirazi: Cannon, Multi-barrel Gun and Yarghu". Indian Journal of History of Science. 40 (3): 431–6.
Balasubramaniam, R. (2002). Delhi Iron Pillar: New Insights. Delhi: Indian Institute of Advanced Studies [University of Michigan].
ISBN81-7305-223-9.
Banerji, Sures Chandra (1989). A Companion to Sanskrit Literature. Motilal Banarsidass.
ISBN81-208-0063-X.
Barker, Dian (2003). Tibetan Prayer Flags. Connections Book Publishing.
ISBN1-85906-106-0.
Barua, Pradeep (2005). The State at War in South Asia.
Nebraska: University of Nebraska Press.
ISBN0-8032-1344-1.
Blechynden, Kathleen (1905). Calcutta, Past and Present. Los Angeles: University of California.
Bondyopadhyay, Probir K (1988). "Sir J. C. Bose's Diode Detector Received Marconi's First Transatlantic Wireless Signal of December 1901 (The "Italian Navy Coherer" Scandal Revisited)". Proc. IEEE, Vol. 86, No. 1, January 1988.
Boga, Steven (1996). Badminton. Pennsylvania: Stackpole Books.
ISBN0-8117-2487-5
Bourbaki, Nicolas (1998). Elements of the History of Mathematics. Berlin, Heidelberg, and New York: Springer-Verlag.
ISBN3-540-64767-8.
Bressoud, David (2002), "Was Calculus Invented in India?", The College Mathematics Journal (Mathematical Association of America) 33 (1): 2–13
Broadbent, T. A. A.; Kline, M. (October 1968). "Reviewed work(s): The History of Ancient Indian Mathematics by C. N. Srinivasiengar". The Mathematical Gazette. 52 (381): 307–8.
doi:
10.2307/3614212.
JSTOR3614212.
S2CID176660647.
Brown, W. Norman (1964). "The Indian Games of Pachisi, Chaupar, and Chausar". Expedition, 32–35. University of Pennsylvania Museum of Archaeology and Anthropology. 32 (35).
Chamberlin, J. Edward (2007). Horse: How the Horse Has Shaped Civilizations. Moscow: Olma Media Group.
ISBN1-904955-36-3.
Chandra, Anjana Motihar (2007). India Condensed: 5000 Years of History & Culture Marshall Cavendish.
ISBN981-261-350-1
Cooke, Roger (2005). The History of Mathematics: A Brief Course. New York: Wiley-Interscience.
ISBN0-471-44459-6.
Connors, Martin; Dupuis, Diane L. & Morgan, Brad (1992). The Olympics Factbook: A Spectator's Guide to the Winter and Summer Games. Michigan: Visible Ink Press.
ISBN0-8103-9417-0
Dales, George (1974). "Excavations at Balakot, Pakistan, 1973". Journal of Field Archaeology. 1 (1–2): 3–22 [10].
doi:
10.2307/529703.
JSTOR529703.
Daryaee, Touraj (2006) in "Backgammon" in Medieval Islamic Civilization: An Encyclopedia ed. Meri, Josef W. & Bacharach, Jere L, pp. 88–89. Taylor & Francis.
Dauxois, Thierry & Peyrard, Michel (2006). Physics of Solitons. England: Cambridge University Press.
ISBN0-521-85421-0.
Davreu, Robert (1978). "Cities of Mystery: The Lost Empire of the Indus Valley". The World's Last Mysteries. (second edition). Sydney: Reader's Digest.
ISBN0-909486-61-1
Dickinson, Joan Y. (2001). The Book of Diamonds. Dover Publications.
ISBN0-486-41816-2.
Drewes, F. (2006). Grammatical Picture Generation: A Tree-based Approach. New York: Springer.
ISBN3-540-21304-X
Durant, Will (1935). Our Oriental Heritage. New York: Simon and Schuster.
Dutfield, Graham (2003). Intellectual Property Rights and the Life Science Industries: A Twentieth Century History. Ashgate Publishing.
ISBN0-7546-2111-1.
Emsley, John (2003). Nature's Building Blocks: An A-Z Guide to the Elements. England: Oxford University Press.
ISBN0-19-850340-7.
Finger, Stanley (2001). Origins of Neuroscience: A History of Explorations into Brain Function. England: Oxford University Press.
ISBN0-19-514694-8.
Flegg, Graham (2002). Numbers: Their History and Meaning. Courier Dover Publications.
ISBN0-486-42165-1.
Forbes, Duncan (1860). The History of Chess: From the Time of the Early Invention of the Game in India Till the Period of Its Establishment in Western and Central Europe. London: W. H. Allen & co.
Fraser, Gordon (2006). The New Physics for the Twenty-first Century. England: Cambridge University Press.
ISBN0-521-81600-9.
Gangopadhyaya, Mrinalkanti (1980). Indian Atomism: history and sources. New Jersey: Humanities Press.
ISBN0-391-02177-X.
Geddes, Patrick (2000). The life and work of Sir Jagadis C. Bose. Asian Educational Services.
ISBN81-206-1457-7.
Geyer, H. S. (2006), Global Regionalization: Core Peripheral Trends. England: Edward Elgar Publishing.
ISBN1-84376-905-0.
Ghosh, Amalananda (1990). An Encyclopaedia of Indian Archaeology. Brill.
ISBN90-04-09264-1.
Ghosh, S.; Massey, Reginald; and Banerjee, Utpal Kumar (2006). Indian Puppets: Past, Present and Future. Abhinav Publications.
ISBN81-7017-435-X.
Gottsegen, Mark E. (2006). The Painter's Handbook: A Complete Reference. New York: Watson-Guptill Publications.
ISBN0-8230-3496-8.
Goonatilake, Susantha (1998). Toward a Global Science: Mining Civilizational Knowledge. Indiana: Indiana University Press.
ISBN0-253-33388-1.
Guillain, Jean-Yves (2004). Badminton: An Illustrated History. Paris: Editions Publibook
ISBN2-7483-0572-8
Hāṇḍā, Omacanda (1998). Textiles, Costumes, and Ornaments of the Western Himalaya. Indus Publishing.
ISBN81-7387-076-4.
Hayashi, Takao (2005). Indian Mathematics in Flood, Gavin, The Blackwell Companion to Hinduism, Oxford: Basil Blackwell, 616 pages, pp. 360–375, 360–375,
ISBN978-1-4051-3251-0.
Iwata, Shigeo (2008), "Weights and Measures in the Indus Valley", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd edition) edited by
Helaine Selin, Springer, 2254–2255,
ISBN978-1-4020-4559-2.
James, Jeffrey (2003). Bridging the Global Digital Divide.
Cheltenham: Edward Elgar Publishing.
ISBN1-84376-206-4.
Jones, William (1807). The Works of Sir William Jones (Volume 4). London.
Kamarustafa, Ahmet T. (1992). "Part 1 No. 1: Islamic Cartography 1". Cartography in the Traditional Islamic and South Asian Societies. Vol. 2 Book 1. New York: Oxford University Press US.
ISBN0-226-31635-1
Katz, V. J. (1995). "Ideas of Calculus in Islam and India". Mathematics Magazine. 68 (3): 163–174.
doi:
10.2307/2691411.
JSTOR2691411.
Kearns, Susannah C.J. & Nash, June E. (2008). leprosy. Encyclopædia Britannica.
Kieschnick, John (2003). The Impact of Buddhism on Chinese Material Culture. New Jersey: Princeton University Press.
ISBN0-691-09676-7.
Kipfer, Barbara Ann (2000). Encyclopedic Dictionary of Archaeology. (Illustrated edition). New York: Springer.
ISBN978-0-306-46158-3.
Koppel, Tom (2007). Ebb and Flow: Tides and Life on Our Once and Future Planet. Dundurn Press Ltd.
ISBN1-55002-726-3.
McIntosh, Jane (2007). The Ancient Indus Valley: New Perspectives. Illustrated edition. California: ABC-CLIO.
ISBN1-57607-907-4.
Meri, Josef W. (2005). Medieval Islamic Civilization: An Encyclopedia. Routledge.
ISBN0-415-96690-6.
Millar, Stuart (2004). "Using Technology: Handheld PC Bridges Digital Divide". World in Motion: Future, Science and Technology. Denmark: Systime. pp. 167–169.
ISBN87-616-0887-4
Murray, H. J. R. (1913). A History of Chess. England: Oxford University Press.
Narlikar, J. V. (2002). An Introduction to Cosmology. Cambridge University Press.
ISBN0-521-79376-9.
Nejat, Karen Rhea Nemet. (1998). Daily Life in Ancient Mesopotamia. Connecticut: Greenwood Publishing Group.
ISBN0-313-29497-6.
Nitis, Mukhopadhyay (2000). Probability and Statistical Inference. Statistics: A Series of Textbooks and Monographs. 162. Florida: CRC Press USA.
ISBN0-8247-0379-0.
Pacey, Arnold (1991). Technology in World Civilization: A Thousand-year History. MIT Press.
ISBN0-262-66072-5.
Ploker, Kim (2007) "Mathematics in India". The Mathematics of Egypt, Mesopotamia, China, India, and Islam: A Sourcebook New Jersey: Princeton University Press.
ISBN0-691-11485-4
Ponomarev, Leonid Ivanovich (1993). The Quantum Dice. CRC Press.
ISBN0-7503-0251-8.
Possehl, Gregory L. (2002). The Indus Civilization: A Contemporary Perspective. Maryland: Rowman Altamira.
ISBN0-7591-0172-8.
Prathap, Gangan (March 2004). "Indian science slows down: The decline of open-ended research". Current Science. 86 (6): 768–769.
Pruthi, Raj (2004). Prehistory and Harappan Civilization. New Delhi: APH Publishing Corp.
ISBN81-7648-581-0.
Purohit, Vinayak (1988). Arts of Transitional India Twentieth Century. Mumbai: Popular Prakashan.
ISBN0-86132-138-3
Puttaswamy, T. K. (2000), "The Mathematical Accomplishments of Ancient Indian Mathematicians". Mathematics Across Cultures: The History of Non-western Mathematics. New York: Springer Publishing.
ISBN0-7923-6481-3
Rousselet, Louis (1875). India and Its Native Princes: Travels in Central India and in the Presidencies of Bombay and Bengal. London: Chapman and Hall.
Roy, Ranjan (1990), "Discovery of the Series Formula for by Leibniz, Gregory, and Nilakantha", Mathematics Magazine (Mathematical Association of America) 63 (5): 291–306
Saliba, George (1997). "Interfusion of Asian and Western Cultures: Islamic Civilization and Europe to 1500". Asia in Western and World History: A Guide for Teaching. Edited by
Ainslie Thomas Embree &
Carol Gluck. New York: M.E. Sharpe.
ISBN1-56324-265-6.
Sanchez & Canton (2006). Microcontroller Programming: The Microchip PIC. CRC Press.
ISBN0-8493-7189-9.
Sarkar, Tapan K. etc. (2006), History of Wireless, Wiley-IEEE,
ISBN0-471-78301-3.
Schafer, Edward H. (1963). The Golden Peaches of Samarkand: A Study of T'ang Exotics. California: University of California Press.
ISBN0-520-05462-8.
Schwartzberg, Joseph E. (1992). "Part 2: South Asian Cartography: 15. Introduction to South Asian Cartography". The History of Cartography – Cartography in the Traditional Islamic and South Asian Societies (Volume 2 Book 1). Edited by
J.B. Harley and
David Woodward. New York: Oxford University Press USA.
ISBN0-226-31635-1.
Shukla, R.P. in "Laser Interferometers for Measuring Refractive Index of Transparent Materials and Testing of Optical Components", Laser Applications in Material Science and Industry. 20–27. Allied Publishers.
ISBN81-7023-658-4.
Srinivasan, S. Wootz crucible steel: a newly discovered production site in South India. Institute of Archaeology, University College London, 5 (1994), pp. 49–61.
Srinivasan, S. and Griffiths, D. South Indian wootz: evidence for high-carbon steel from crucibles from a newly identified site and preliminary comparisons with related finds. Material Issues in Art and Archaeology-V, Materials Research Society Symposium Proceedings Series Vol. 462.
Stein, Burton (1998). A History of India. Blackwell Publishing.
ISBN0-631-20546-2.
Stepanov, Serguei A. (1999). Codes on Algebraic Curves. Springer.
ISBN0-306-46144-7.
Stillwell, John (2004). Mathematics and its History (2 ed.). Berlin and New York: Springer, 568 pages.
ISBN0-387-95336-1.
Taguchi, Genichi & Jugulum, Rajesh (2002). The Mahalanobis-taguchi Strategy: A Pattern Technology System. John Wiley and Sons.
ISBN0-471-02333-7.
Teresi, Dick; et al. (2002). Lost Discoveries: The Ancient Roots of Modern Science—from the Babylonians to the Maya. New York: Simon & Schuster.
ISBN0-684-83718-8.
Thomas, Arthur (2007) Gemstones: Properties, Identification and Use. London: New Holland Publishers.
ISBN1-84537-602-1
Thrusfield, Michael (2007). Veterinary Epidemiology. Blackwell Publishing.
ISBN1-4051-5627-9.
Upadhyaya, Bhagwat Saran (1954). The Ancient World. Andhra Pradesh: The Institute of Ancient Studies Hyderabad.
Varadpande, Manohar Laxman (2005). History of Indian Theatre. New Delhi: Abhinav Publications.
ISBN81-7017-430-9.
Wenk, Hans-Rudolf; et al. (2003). Minerals: Their Constitution and Origin. England: Cambridge University Press.
ISBN0-521-52958-1.
Whitelaw, Ian (2007). A Measure of All Things: The Story of Man and Measurement.
Macmillan.
ISBN0-312-37026-1.
Wilkinson, Charles K (1943). "Chessmen and Chess". The Metropolitan Museum of Art Bulletin. New Series. 1 (9): 271–279.
doi:
10.2307/3257111.
JSTOR3257111.
Wise, Tad (2002). Blessings on the Wind: The Mystery & Meaning of Tibetan Prayer Flags. Chronicle Books.
ISBN0-8118-3435-2.
Wisseman, S. U. & Williams, W. S. (1994). Ancient Technologies and Archaeological Materials. London: Routledge.
ISBN2-88124-632-X.
Woods, Michael & Woods, Mary B. (2000). Ancient Transportation: From Camels to Canals. Minnesota: Twenty-First Century Books.
ISBN0-8225-2993-9.