• Organization of entries follows the list of Dewey Decimal classes.

Directories of science reference desks

• Common Science Question and Answers

• Society for American Archaeology
• Ask an Archaeologist - SAA Archaeology for the Public

Science (500–599)

• Ask Science Dude

• ASK JANICE | JVC's Science Fair Projects

• Have a question? - Here you can ask any question that comes to mind. (science and technology)

• Australian Broadcasting Corporation
• Ask an Expert (ABC Science)

• Science: Ask a Question: Get Answers: Free Online Fun for Kids: Alfy.com

• Ask a Scientist

• Ask Harry Gilbert: Science Questions & Answers

• Fred Bortz, Children's Science Writer

• NewScientist The Last Word - Index page ("the place where you ask questions about everyday science")

• Ask the Expert: Connecting Students to Scientists

• Washington State University
• MAD Submission Form

• Argonne National Laboratory
• NEWTON, Ask a Scientist at Argonne National Labs!

• science.ca Ask-A-Question

• Science Buddies: Answers to Your Science Questions

• Scientific American
• Scientific American: Ask the Experts

• Scientist Solutions

• Science Matters! - Last Update: 1/1/97

• Science mysteries solved - ask a question - get clear, accurate answers - by WonderQuest (science)

• Discovery Channel
• Ask Wendell: Science Entertainment for Kids

Mathematics (510–519)

See User:Wavelength/About Internet & WWW/Ask an expert/Mathematics.

Astronomy (520–529)

• astronomyLINKS - ask the expert - astronomy and space directory, links, booksmarks and more. (directory of astronomy reference desks)

• Aerospaceweb.org | Ask Us - Ask a Rocket Scientist

• Cornell University
• Curious About Astronomy? Ask an Astronomer

• George Mason University
• Ask an Astronomer

• Ask the Astronomer at The Astronomy Cafe : Dr. Sten Odenwald - 3000 FAQs and answers!!!

• Public Broadcasting Service
• Mysteries of Deep Space - Ask the Experts

• NASA
• HSF-Feedback-Ask the Experts (human space flight)

• NASA
• Ask an Astrophysicist

• NASA
• NASA - IMAGE Education and Public Outreach (space science)

• NASA
• SPARTAN 201-3: Ask the Astronomers (and Space Physicists)

• NASA
• :: NASA Quest > Q and A ::

• NASA
• NASA's Cosmicopia -- Ask Us (NASA's Cosmicopia -- Ask Us)

• NASA
• Introduction « Ask an Astrobiologist « NASA Astrobiology

• NASA
• Brain Bites - NASA Science

• NASA
• Caenorhabditis elegans
• Ask a C.elegans Expert a question!

• NASA
• Aerospace Team Online: Ask Questions

• NASA
• NASA - IMAGE Education and Public Outreach (space science)

• NASA
• NASA - NASA Chat: The Quest for Planets

• Readers Ask Questions and Space Today Online Answers

• Ask the Experts (physics and astronomy)

• Wichita State University
• Lake Afton Public Observatory
• Ask an Astronomer

• Ask the Astronomer | Your Astronomy Questions Answered | Windowpane Observatory

• You Ask Andy (questions about astronomy, life science, earth science, physical sciences & geography)

• Stanford SOLAR Center -- Ask A Solar Physicist

• Dr. C. ("Your Personal Mars Expert") ("a computerized scientist")

Physics (530–539)

• The Bubblesphere

• Princeton Plasma Physics Laboratory
• ippex online - main (The Internet Plasma Physics Education Experience)

• University of Illinois at Urbana–Champaign
• Q & A: Ask the Van | Department of Physics | University of Illinois at Urbana-Champaign

• Channel 4
• Master of the Universe - Trivia - Ask An Expert: Your Questions & Answers - Channel 4

• Fermilab
• Inquiring Minds ("Physics Questions People Ask Fermilab")

• How Everything Works - How Everything Works Home Page ("Explaining the physics of everyday life")
• How Everything Works - Topics (physics)

Light and paraphotic phenomena (535)

• Vragen en antwoorden over elektro-magnetische straling (Questions and answers about electromagnetic radiation)

• Rochester Institute of Technology
• Ask a Color Scientist!

• Ask the Experts (radiation safety)

• Health Physics Society
• Radiation Information - Questions and Answers | Radiation Information and Answers

Chemistry (540–549)

• Frostburg State University, Frostburg, MD
• General Chemistry Online: Just Ask Antoine

• American Chemistry Council
• americanchemistry.com : ask a question

• Chemical Forums - Index

• Free High School & College Chemistry Help | My Chemistry Tutor

• National Center for Manufacturing Sciences
• Paint and Coating Resource Center

• Ask an Expert : Radiochemistry Society

Earth sciences (550–559)

• United States Geological Survey
• USGS Mineral Resources Program: Resource Specialists Directory

• United States Geological Survey
• USGS: Ask-A-Geologist

• United States Department of Energy
• Ask A Scientist - Environmental and Earth Science Index

• Home Energy Topics - EnergySavvy.com

• University of Hawaii
• Ask an Earth-Scientist

• University of Hawaii at Manoa
• Ask an Earth-Scientist

• University of Illinois at Urbana–Champaign
• Institute of Natural Resource Sustainability (geology)

• Platinum Metals Review (scientific journal)
• PMR: Ask a Question

• Virginia Institute of Marine Science
• Bridge - Ask An Oceanographer

• Ask a Gemologist

• R4U!(TM)="Diamonds Are For You"--Van-Daaz's Diamond Question & Answers center

• ask Dave West: The Jewelry Expert: Questions & Answers

• USA Today
• Ask the Experts: Your weather questions answered - USATODAY.com

• Hurricane Hunters ( 53d Weather Reconnaissance Squadron)
• Hurricane Hunters Association

• Ask A Weather Question

• Ask Dave (questions about weather and climate)

• Ask Jack a Question | Jack Williams (about weather)

Paleontology and paleozoology (560–569)

• Morrison Natural History Museum, Morrison, Colorado
• MNHM: Education: Ask Us ("Ask-A-Paleontologist")

• Bureau of Land Management at United States Department of the Interior
• BLM Paleontology (ask the paleontologist)

Life sciences and biology (570–579)

• Howard Hughes Medical Institute
• Ask a Scientist (biological sciences)

• Welcome to Ask a Biologist | Ask A Biologist

• Arizona State University
• Ask A Biologist
• Ask A Biologist | ASU - Ask A Biologist

• Ask Dr. Pat - your biology resource

• SeaWorld
• Busch Gardens
• ASK SHAMU - Index (marine biology)

• Ask Jake, the SeaDog ~ WhaleTimes.org (marine biology)

• Ask Questions (biology)

• National Museum of Natural History
• Ask the Expert (biology)

• eNature: Ask an Expert

• Popular Science (magazine)
• Ask an Interspecies Musicologist | Popular Science

• Jim Harding (wildlife expert), Michigan State University Museum, Michigan State University, East Lansing, MI
• Wildlife & Natural History Q-line - Ask Jim Your Questions

Ecology (577)

• Ask the Green Fairy (questions about going green)

• GreenAnswers | Environmental Questions & Answers

• Ask Ben - The Answers to Your Biodiesel Questions!

• Chasing Clean Air: Ask Donna

• ASK THE EXPERTS

• Environmental Working Group
• Enviroblog

• U.S. Global Change Research Information Office
• U.S. Global Change Research Information Office

• Ask Green Irene Knowledgebase (about green products and solutions)

• Green Pro Forums, Ask Green Pro, Green Home Improvement Questions (questions about going green)

• Grist (magazine)
• Ask Umbra on Grist

• Ask A New Jersey Environmental Expert

• Mother Earth News
• Ask Our Experts blog ("Answers to questions about gardening, energy, homesteading and other sustainable living topics.")

• Slate (magazine)
• The Green Lantern 2011 - Illuminating answers to environmental questions. - Slate Magazine

• Sabine River Authority of Texas
• Water Wizard

• Ask the Expert Webinar Series | TestAmerica Laboratories, Inc. (questions about environmental testing)

• Green Numbers Radio: Ask the Expert Show (based in San Diego) (about going green and being profitable)

Plants and botany (580–589)

Animals and zoology (590–599)

• American Society for the Prevention of Cruelty to Animals
• ASPCA | Ask Azula ("The website for kids who love animals")

• Ask the Entomologist - Terminix Service, Inc.

• Zoo Tycoon - Ask the Zookeeper

• Dickerson Park Zoo
• Ask the Zookeeper | Dickerson Park Zoo

• Lincoln Children's Zoo
• Lincoln Children's Zoo Ask a Zookeeper

• AskTheBeekeeper

• Ask The Beekeeper

• Beekeeping/Frequently Asked Questions - Wikibooks, open books for an open world

• University of Minnesota
• Ask the Expert ( monarch butterflies)

Cold-blooded vertebrates, fishes (597)

• - Gopher Tortoise Ask the Expert - Friends of the Enchanted Forest - Titusville, Florida ( gopher tortoise)

Aves; Birds (598)

• Cornell University, Ithaca, NY
• Frequently Asked Questions, Ask an Expert, All About Birds, Cornell Lab of Ornithology

Mammalia; Mammals (599)

• Wheelock College
• WhaleNet/ASK a Scientist (marine mammals)

Technology (600–699)

Technology; Applied sciences (600–609)

• Saskatchewan Institute of Applied Science and Technology
• SIAST Library Services

• iFixit
• Answers - iFixit

Invention and patents (608)

• Ask The Inventors

Medical sciences: medicine (610–619)

General medicine reference desks (including some with specialist categories)

• Ask Question To An Online Doctor | Online Doctors , Free Health Advice , Health News, Treatment, Cure and Prevention Of diseases

• Ask a Doctor Online

• Ask Dr. Gott

• Ask Medical Questions Online (directory of medical reference desks)

• Ask Dr Pat... Dr Patricia Boulogne

• Health Experts: Ask Health Questions of Professionals - MSN Health

• Webcam Doctors (tm) - Online Doctor Services by webcam

• Ask A Doctor | Online Doctor | Ask The Doctor | Ask Doctor

• Beaumont Hospitals, Royal, Michigan
• Ask a Beaumont Doctor

• Ask A Doctor Free Online | FREE LIVE Doctor Chat Now

• Ask a Doctor a Question | Online Medical consultation | Dr Chat

• Ask Doctor For Free - Get your medical questions answered by one of our doctors (FREE)

• Dr. Dawn Motyka, KUSP radio, Santa Cruz, California
• Ask Doctor Dawn (audio archives)

• Ask a medical doctor. Get your medical questions answered by one of our doctors.

• Ask Medical Experts - Online Medical Advice - Doctors answer your questions

• Ask Online Doctor | Ask A Doctor | Ask The Doctor | Your Health Questions Answered with Online Live Chat Doctor Consultation

• Ask Online Doctors : Ask a Dr : Web MD : Medical Advice : A Doctor Online Live : OB Gyn : Family Practice : On Line for Chat : Medical Questions : Askonlinedoctor

• Ask The Doctor - Ask A Doctor Medical Questions (FREE) (page opens with running video about the service, duration 2:51)

• Ask the Doctor Online (based in South Africa)

• Ask Wellness - What's Your Wellness Question?

• Free patient websites, blogs, support and community - CarePages.com ("CarePages websites are free patient blogs that connect friends and family during a health challenge")

• Ask the Expert Questions & Answers | Care New England Wellness Center Warwick, RI

• CNN
• Health News - Medical, Mental and Dental Treatment - Beauty, Nutrition and Fitness - CNN.com

• Consult Doctors Medical Advice Health Questions

• Consulting health care from The Consulting Health Group, natural health care, mental health care, dog health care, cat health care

• Descipher™ - Simplify Science™

• Diagnose-Me - Online Diagnosis - Diagnostic Tool

• Ask Dr.Oz | The Dr. Oz Show

• Doctors Lounge - Ask a Doctor Free, Online Medical Community, Forum, Encyclopedia

• DrJoshua.com - Ask the Doctor Online - Free Medical Questions

• Andrew Weil
• Ask Dr. Weil

• Online Medical Consultation | EasyHealthMD (by webcam and telephone) (in English and Spanish)

• eDocAmerica

• Home - Embarrassing Problems

• Ask the Experts - a forum for medical questions related to living in Indonesia - page 1

• Columbia University
• Go Ask Alice!
• Go Ask Alice! - Columbia University's Health Q&A Internet Service

• Ask a top specialist - Online medical advice/diagnosis
• Ask your health Question in the Community

• Take control of your health |HealtheTreatment.com (enabling conversations between people with similar conditions or symptoms)

• Ask Health Questions Online For Quick Answers:Ask Health Questions

• Holly Peek (student), Tulane University, New Orleans, LA
• Ask Holly (health questions)

• Ask A Doctor Online Free, A free Online Doctor To Ask Now!

• Ask Health Questions - Get down-to-earth answers

• InteliHealth:

• Ask The Doctor, Medical Questions Answered - Just Ask Medical

• Home | MDTalks - Free Personalized Medical Questions and Answers

• Health community, health information, medical questions, and medical apps - MedHelp

• Ask the Experts Index of Topics. Find answers to your health and medical questions on MedicineNet.com

• Medpedia
• Medpedia - Medpedia ("Ask a Medical/Health Question")

• Mountain States Health Alliance
• Ask-A-Nurse (service by telephone, for TN, VA, NC, and KY only)

• Ask the doctor

• Ask an Expert - Help

• Ask The Doctor Online - Your Family Doctor

• Online Medical Advice | Health and Medical Information

• Medical Mall - Ask-a-Doc

• Ask a Doctor Medical Questions Online

• Medical Questions Answered Free : Ask Medical Questions

• Ask Our Doctors

• The Globe and Mail, based in Toronto
• Ask a Health Expert - The Globe and Mail

• Medical questions-Answer my health question-Themedicalquestions.com

• The Patient Forum - Ask the Expert

• University of Maryland Medical Center
• Ask the Expert

• Health care question and answers - Ask, answer and share

• World Health Organization
• WHO | Online Q&A (in Arabic, Chinese, English, French, Russian, and Spanish)

• Ask medical questions to a Doctor Online

• Medical Questions? Ask a Doctor for Free Health Info | ZocDoc Answers

• Ask the Expert

• Free Ask A Doctor Online | Find A Doctor In My Area | Find A Physician | Local ImYourDoctor - ImYourDoctor.com (for the United States)

Ears; hearing

• Expert chat - Hear the World

Eyes; vision; ophthalmology

• Ask the Medical Eye Doctor, infections, allergies, iritis, surgery and more

• American Health Assistance Foundation
• Glaucoma: Ask an Expert

• American Health Assistance Foundation
• Macular Degeneration: Ask an Expert

• Eye Doctor Q and A - Table of Contents - AllAboutVision.com

• Ask the Medical Eye Doctor, eye infections, LASIK, allergies, iritis, surgery, dilated pupils and more

• American Academy of Ophthalmology
• Ask an Eye M.D.

• Ask an Eye Doctor | Glaucoma Research Foundation

Heart; cardiology

• Ask the Cardiologist

Lungs; pulmonology

• YourLungHealth.org - Ask Dr. Tom

Mental health

• American Health Assistance Foundation
• Alzheimer's Disease: Ask an Expert

• Ask Happyshrink: Mental Health information, advice and humor

• Ask the Mental Health Expert Archives 2001-2004

• Anxiety Advice

• Coping Questions and Tips

• Relaxation Questions, Tips, and Requests

• Stress Coping: Questions and Answers About Stress

Muscles and bones

• Ask Dr Bones (musculoskeletal health-related questions)

• RheumMD | Your arthritis questions. Expert answers.

• American Podiatric Medical Association
• Ask The Expert (podiatry; feet)

• Arthritis Foundation
• Arthritis Answers

• Arthritis Foundation
• Expert advice | Doctors Answer Questions | Arthritis Today Magazine

• Johns Hopkins Hospital
• Arthritis ask the expert

• Ask the Chiropractor

Naturopathy

• Natural Health Information: Ask Free Health Questions & Natural Health Articles - NaturalHealthInformation.org

• Ask Lena Health Questions and Answers Archives

• Welcome To Askanaturopath.com - Ask a Naturopath Home

• Ask Dr. Hull Alternative Health Web Forum

• Ask Dr. Mao | The Natural Health Search Engine

• Ask The Doctor - Green Health Spot

• Answer my Health Question Online - Ask Health Questions now

• Ask a Naturopathic Doctor - MyWebND

• Home Remedies - Health Questions & Answers Forum - Natural Treatments

Nutrition; diet

• Ask Andy | Food Hygiene Essentials

• Allergy Specialist and Clinical Nutritionist

• Dr. Richard Bernstein
• Teleseminar (questions about diabetes)
• Ask Dr. Richard K. Bernstein

• AskDrRichardWilliams.com (questions about noni juice)

• Ask Fitness Coach - Answering The Questions That Burn | Exercise | Nutrition | Hypnosis For Weight Loss | Supplements

• Brenda Watson, Digestive Care & Nutrition Expert | Achieve Vibrant Health & Wellness

• CINDY SAYS • WELLNESS • FITNESS • NUTRITION - Ask Cindy

• Ask the Dietitian® Home

• Harvard School of Public Health at Harvard University, Boston, MA, USA
• Your Nutrition Questions Answered - The Nutrition Source - Harvard School of Public Health

• Ask Health Questions About Any Type Of Digestive Diseases, Other Health Issues.

• Ask The Expert | LittleStomaks

• Nutrition.com.sg - Ask the Dietitian (for Singapore and region)
• NutritionWerks - Ask A Dietitian (for North America)

Food safety

• Federal government of the United States ( FSIS, USDA, FDA, CDC)
• Ask the Experts | FoodSafety.gov

• Ask a Food Safety Expert

• US Food Safety Corporation, Wilmington, MA
• Ask Heidi (about food safety)

Eating disorders

• Ask a Diabetes Expert

• National Eating Disorders Association ("Ask an Expert")
• National Eating Disorders Association

• Questions & Answers (anorexia, bulimia, eating disorders)

Occupational safety and health

• National Institute for Occupational Safety and Health
• CDC - Ask an Occupational Safety and Health Question - NIOSH

Physical training

• Fitness Questions - Ask A Fitness Expert - Ask A Personal Trainer

Radiological issues

• Integrated Environmental Management, Inc.
• Ask A CHP - IEM ["Integrated Environmental Management, Inc. (IEM) is pleased to offer visitors to this web site an opportunity to ask a Certified Health Physicist (CHP) a question on any radiological issue that your firm or organization is facing. "]

Sports medicine

• Runner's World
• Ask Coach Jenny | Runner's World
• Ask the Sports Dietitian | Runner's World
• Ask the Race Director | Runner's World
• Ask the Sports Doc

Teeth; dentistry

• Ask the Dentist

• Ask The Dentist Dental Health Directory Ask Dental Questions Get Professional Answers for Dental Problems

• FLUORIDE CLASS ACTION » Ask Dr. Sauerheber (questions about "the science surrounding fluoridation")

• Spencer Zaugg | Family & Implant Dentistry

• Ask an Expert - Get Answers from the Experts at Fixodent | DentureLiving.com

Pharmacology and therapeutics (615)

• Online Therapy, Counselling & Mental Health Resources

• Ask the Therapist

• Drug Questions? Ask Curtis

• Ask FES a Question (flower essence therapy)

• Food Safety and Inspection Service at United States Department of Agriculture
• Salmonella Questions and Answers

• Got a GMP question? Ask Globepharm for an answer ( good manufacturing practice for pharmaceuticals)

• Pill Swallowing Questions & Answers - Ask the Expert! Dawn Winkelmann, M.S. CCC-SLP

• Ask the expert | PJ Online (pharmacy and medicines)

Diseases (616)

• Ask An Oncologist Now - Get your cancer related questions answered by one of our oncologists (FREE)

• Information Request ( ADHD)

• ADHD and Omega-3 Fish Oil Supplements Safe Dosage | Attention Deficit Hyperactivity Disorder Experts - ADDitude ( attention deficit hyperactivity disorder)

• Temple Grandin
• Welcome to Temple Grandin's Official Autism Website

• Autism Today, latest news and resources for autism and autism related issues

• Live Q & A Events - Ambitious about Autism

• Epilepsy Foundation
• Epilepsy Foundation-Ask the Epilepsy Resource Center Staff

• Centers for Disease Control and Prevention
• CDC: West Nile Virus - Questions and Answers Index (in English and Spanish)

• Ask an Expert: Questions and Answers by Derrick DeSilva Jr., M.D. - Diseases and Disorders - InsidersHealth.com

• Prostate Cancer Treatment Questions and Answers

• Thimerosal, squalene and Guillain-Barré: Expert answers to your seasonal and H1N1 flu questions

• Federal government of the United States
• Got Questions? Ask the Flu Experts! | Flu.gov (in English and Spanish)

• Medical Questions and Information About Mesothelioma; It's diagnosis, malignacy, treatment, specialist, and links to asbestos cancer reasearch, asbestosis medicine, mesothelioma treatment centers and mesothelioma legal resources. [ sic] ( asbestosis and asbestos cancer)

• International Hyperdrosis Society
• International Hyperhidrosis Society: Ask Frances: (about teen hyperhidrosis, excessive sweating in teens)

• Project Inform
• Ask a question about HIV care | Project Inform

• Johns Hopkins School of Medicine, Baltimore, MD
• Ask the Doctor About GERD: Johns Hopkins Health Alerts (about gastroesophageal reflux disease)

• Johns Hopkins School of Medicine, Baltimore, MD
• Johns Hopkins CF Center | What is CF? | Ask the Experts (about cystic fibrosis)

Surgery and related medical specialties (617)

• Ask Plastic Surgeons Questions - Plastic Surgery Experts Answer Your Questions - Plastic Surgery Answers From Board Certified Plastic Surgeons

• Ask a Board Certified Plastic Surgeon Your Questions - Breast Augmentation Expert Answers Your Questions - Ask an Expert at Breast Implants USA

• NoBlood Answers ( bloodless surgery)
• Ask a Professional ( bloodless surgery)

Gynaecology and other medical specialties (618)

• Ask Dr. Amy - Am I Pregnant?

• Ask a Midwife

• Girl puberty questions? Ask Iris - expert online! All growing up issues - BeingGirl.com

• Ask your question | Expert Q/A | Pregnancy Today

• Ask your question | Expert Q/A | Babies Today

• Ask the Experts | mothering

• RESPA: Ask the Expert, Answers
• Ask the Expert (teen health)

• Expert Answers on. . . (teen health) (in English and Spanish)

• FRANK - Talk to FRANK (about drugs)

• Ask an expert | Advice and information | NHS SmokeFree ( smoking cessation)

• Ask an Expert (continence)

• OncoLink Ask the Experts, Cancer Symptoms, Cancer Prevention, Cancer Treatment

• OncoLink Ask the Experts, Cancer Symptoms, Cancer Prevention, Cancer Treatment

• Prostate Cancer Treatment Questions and Answers

• Eyes on the Prize: Frequently Asked Questions about Gynecologic Cancers: Answers from the Pros: Cervical, Endometrial, Ovarian, Uterine, Gestational, Vulvar, Vaginal | EyesOnThePrize.org

• Ask the Expert - Get Answers from Medical Professionals | Know Cancer

• Families of Spinal Muscular Atrophy - Ask the Expert ( spinal muscular atrophy)

• Ask The Expert: Neurology Questions and Answers - Pri-Med Online

• Ask The Expert | Cornelia de Lange Syndrome (CdLS) Foundation, Inc.

• All Questions Relating To "Ask the Expert" - Chronic Pain

• Ask The Nurse Online, Nurse, Natural Health Remedies, Health Tips

• Ask The Nurse, Get Live Health & Medical Advice

• Ask a Geneticist

• Ask Dr. Warren (pediatrics)

• Johns Hopkins School of Medicine
• Ask an Expert: Johns Hopkins Breast Center

• Ask the Pediatrician about Your Childrens Health

• Le Club: Ask the Expert - get feedback directly from women's health experts.

• Menopause Experts, Ask The Experts about Bioidentical hormones, menopause, anxiety, depression, panic attacks, weight, fitness, intimacy, relationships

• Ask an Expert - Answers to Your Pregnancy, Preconception, and Parenting Questions from Leading Medical Experts - BabyZone.com

• Expert Baby Advice & Answers to Baby Questions | BabyCenter (international and multilingual: see links at bottom right-hand corner of page)

• A Pediatrician Answers Baby and Toddler Medical Questions

• Ask The Experts | I N F E R T I L I T Y A W A K E N I N G

• About Heavy Periods - Ask Dr. Crystal Strickland About Heavy Periods

• obgyn - Women's Health

• Ask the Gynecologist About PCOS | PCOS - Polycystic Ovarian Syndrome (questions about polycystic ovary syndrome)

• Ask gynecology related questions on Live Gynecologist

• ask an expert, Paediatrician, Gynecologist, Child Specialist (for Indian mothers)

• Questions Answered by consultant gynaecologist and obstetrician Mr Clive Aldrich (based in the United Kingdom)

• Gynaeonline (questions about obstetrics and gynecology) (based in India)

• Ask A Question | Austin Midwife Forum

• DrGreene.com | pediatrics. naturally.

Engineering and applied operations (620–629)

• Ask an Expert - TryEngineering

• Ask An Engineer - Engineer Girl

• ENGINEERING.com | Ask@ENGINEERING.com

• element14: Community: Experts (electronic engineering)

• United States Department of Transportation
• SCBT Virtual Team Question and Answers from Ask the Expert (segmental concrete bridge technology)

• Ask a Flight Instructor: Flight Training Questions Answered

• Car Repair Questions Answered Free by Professional Mechanics Information

• New Zealand Automobile Association
• Ask Jack Motoring and Car Forum - aa.co.nz

• Free Auto Repair Questions Online Mechanics Answer Questions FREE

• Ask an Expert | Questions & Answers | Models Buzz ( model building)

• Ask A Citroën Expert

• Auto Repair Questions and Answers for Cars and Trucks | Free Mechanic Help

• ask auto mechanic question here

• Buell Motorcycle Company
• Post a new question - Thunder Road's Ask An Expert ( Harley-Davidson motorcycles)

• AUSTIN WORKS Ask Mr. Austin (automobiles by the Austin Motor Company)

• Ask Frank at Freeway - Mazda Cadillac Car Maintenance Questions

• Ask Dr.Smith (questions about gaskets)

• Global Wind Day » About Wind Energy

Agriculture (630–639)

• The Rodale Institute
• Ask a Farmer | Rodale Institute

• National Sustainable Agriculture Information Service, Butte, Montana
• Ask a Sustainable Agriculture Expert: ATTRA - National Sustainable Agriculture Information Service (in English and Spanish)

• Alabama Agricultural and Mechanical University, Normal, AL
• http://www.aamu.edu/library/Ask_A_Librarian.aspx (Alabama A&M University Library)

• United States National Agricultural Library of United States Department of Agriculture
• National Agricultural Library: Services: Ask a Question

Plant injuries, diseases, pests (632)

• Purdue University
• Frequently Asked Questions - Plant and Pest Diagnostic Laboratory at Purdue University, West Lafayette, Indiana, USA

• Pest Control Questions/FAQ'S

• AsktheExterminator.com - Tips and help from a real pest control expert

• Ask Before You Hire an Exterminator | Superexterminators.com

Garden crops (Horticulture) (635)

• Welcome to Ask a Garden Question

• University of Texas at Austin
• Lady Bird Johnson Wildflower Center
• Ask Mr. Smarty Plants - Native Plant Q&A

• UBC Botanical Garden and Centre for Plant Research
• UBC Botanical Garden Forums

• Cindy Shapton, Cracked Pot Gardener, Franklin, Tennessee
• Got Questions?

• Garden Questions: Garden Questions And Answers

• Ask the Horticulturist - questions all about plants

• Gardening Questions - Post a Question about Gardening, Plants, Tools, and Techniques

• Ask your organic gardening guide

• Fruits & Veggies More Matters » Ask the Expert

• ask a gardening question

• Ask a Gardening Question and Get a Gardening Answer Gardening Know How

• Ask an Expert | Gardening With Children

• Ask Julie Gardening Questions

• Doug Hensel, The Great Big Greenhouse, Richmond, Virginia
• Great Big Greenhouse - Ask Doug Questions and Answer

• Ask a Gardening Question | Horticulture Guy

• Gardening Forum

• Pennsylvania Horticultural Society
• PHS | Your Gardening Questions

• Perennials.com :: Ask an Expert

• Ask & Answer Flower and Gardening Questions - The Flower Expert

• Categories - The Mulch Gardening Forum

Animal husbandry (636)

Animal husbandry in general

• Ask a online vet - ask a vet pet health questions online

• Ask A Vet. Online Veterinary Advice. Talk to veterinarian, Dr. Marie.

• American Society for the Prevention of Cruelty to Animals
• ASPCA | Ask the Experts (veterinary)

• Questions & Answers - BarkleyAndPaws

• Clay County Humane Society, Inc., Orange Park, Florida
• Ask Jake and Scout (about pets)

• Free online veterinarian advice. Veterinary Blog, Dog and Cat Health Information, Questions, and Answers

• Ask Questions, Get Answers from Experts ASAP | JustAnswer (veterinarian information)

• Ask Dr. Grover « Pawsitively Good Advice – Dr. Tyson Grover, DVM

• Ask A Veterinarian Your Pet Health Questions. Your Online Veterinarian Is Here To Help.

• Pet Care Questions and Answers | Expert Pet Advice | PetPeoplesPlace.com

• Ask a Vet Online. Ask a Veterinarian Pet Health Questions 24/7 « VetLIVE

• Veterinary Questions Answered by Dr. Robert | Vetquestionsanswered.com

Dog husbandry

• Ask a Dog Breeder: Dog Breeding Information, Storefront, Questions, Tips, Advice & Forums - Dog Mating

• Dog Training Answers, US K9 Academy, Ask the Dog Trainer

• Ask the Dog Training Expert For Dog Training Tips & Dog Training Advice

• Dog Questions, Dog Training Tips, Dog Health Problems

• Feel free to contact us, Pedigreedpups.com, at anytime

• Ask a Vet Your Dog Health Questions: It's Simple, Quick and Affordable

• Ask the Vet - Consult a Veterinarian Online (German shepherd dogs)

• Ask Cindy! — Chihuahua Help and Resources so your chihuahua can be healthy, happy and sassy

Horse husbandry

• American Association of Equine Practitioners
• Ask The Vet - AAEP (equine veterinary)

• Rutgers University
• Ask the Expert (New Jersey Agricultural Experiment Station: Equine Science Center)

• ask-a-vet online about your horse questions.

• HorseGazette.com - Ask the Vet

• Ask the Trainer Forum - Horse Questions Answered by Samantha Harvey

• The Horse | Ask the Vet: Articles and Live Chat Events

Bird husbandry

• World Parrot Trust
• World Parrot Trust - Ask an Expert

Fish husbandry

• Ask the Expert - The First Tank Guide - Question Submission Form (fish tanks)

Home economics and family living (640–649)

Home building and home improvement

• A Handy Man

• Home Improvements Discussion, Ask-Questions.com

• Ask the Builder - The Home Improvement Resource

• Ask The Log Doctor - Questions / Answers about Log Home Repair and Restoration!

• Andy's Cabin Design and Building — How to Design, Build and Live in a Small Cabin or Cottage

• Get Expert Answers | eRenovate.com has Experts to Answer Your Questions, Personally

• Ask the Experts | Self Build, Renovate or Convert Your Own House | Renovation | Home Building & Renovating UK

• Masterhandyman

• WHAM (AM), Rochester, NY
• Ask Jim - ROCHESTER'S NEWS LEADER NEWSRADIO 1180 WHAM (home repair questions)

Basements

• Ask Dave Schrock your basement remodeling questions

• Basement Questions and Answers

House painting

• House Painting Questions and Answers

Housekeeping

• Heloise (columnist) (household hints)
• Heloise

House cleaning

• House Cleaning Tips | Stain Removal Help | Mrs Clean House Cleaning Central

Moving

• Moving Companies Expert - Ask questions about moving services and moving expert will answer.

Weddings

• Dexknows.com Answers - Ask Questions, Share Your Knowledge (weddings and home improvement)

• Ask Iris Fields Weddings Event Planning + Advice NYC | Wedding, Event Planner

• Ask The Expert : Wedding, Supplies, Accessories, Cake Toppers, Favors, Ideas

• Ask The Expert : The Wedding Expert

• Wedding Etiquette - Questions About Planning A Wedding? Ask Mikki!

• Ask The Expert - Wedding Mapper

Landscaping

• Ask Daniel (questions about landscape design)

Landscaping and outdoor construction

• JustAskDave (questions about landscaping and outdoor construction)

Food and drink (641)

• ask jo ("making ordinary food extraordinary")

• Food Network (Canada)
• Ask an Expert - Food Network Canada

• Ask the Expert - MyRecipes.com (cooking questions)

• Veganizzm: The Nuts & Oats of Vegan Cooking - Ask me anything

• Ask Chef Silvia!

• Ask The Sommelier - Have Your Wine Question Answered By An Expert For Free Today

• Hotline - Food52 - food community, recipe search and cookbook contests

• Just Ask Jill ("recipes, menus, cooking tips and local food finds" in Southern California)

Barbecuing and grilling

• Ask BBQ Bob | The Grillin' Guys

• Ask Dave a BBQ or Grilling Question

Meat

• Ask the Butcher-Lobel's Culinary Club

Restrictive diets

• askjeanduane.com (gluten-free, dairy-free, allergy-free cooking)

• Ask Jamie Geller | Kosher Recipes – Joy of Kosher with Jamie Geller author of the bestselling kosher cookbook – Quick and Kosher

Household utilities (644)

Electrical wiring

• Ask Your Electrician

• Electrical Helper - Ask An Electrician

• Ask An Electrician

• Install and Repair Electrical Wiring - Tutorials by a Licensed Electrical Contractor

• Ask Questions : Electrical Online : Electrical Online

• Ask an Electrician | My Local Electrician

• Ask an Electrician

Plumbing and heating

• Ask a Plumber.ca ::

• Ask a Plumber

• Plumbing or heating problems? Why not Ask the Plumber

Furnishing and decorating the home (645)

• ask patrick (interior design)

• Ask the Interior Decorator

• Ask Interior Designer

Glass tile

• About Glass Tile

Sewing, clothing, personal living (646)

• Quiltworx.com - Ask Judy a Question - Buy Foundation Paper Piecing Quilt Patterns - Quilt Shop

• Quilting Questions

Child rearing and home care of sick and infirm (649)

Parenting

• ! Parenting Adolescents and Children

• Ask Dr. Sears® | A Trusted Resource for Parents

• BabyGizmo.com - Ask the Editors (questions about baby products)

• Parenting Advice and Parenting Tips

• Dr. Toy - The Name You Trust - Online Since 1995 (advice on children's products)

• Parenting - Questions and Answers main page. Q&A - Minti

• ParentsAsk

Mothering

• Ask Cindy… : Welcome to Mom-to-Mom Radio Show!

• Mamapedia™ - The wisdom of moms™

• Ask the Experts (questions about mothering)

• Experts (on SavvyMom.ca)

Fathering

• Ask a Question » Ask Mr. Dad (questions about fathering)

• Caregiving Questions | Senior Health and Legal Questions | Caring.com

Seniors

• Ask Esther - Questions about Retirement Living (for Canada) (with Microsoft Translator)

Management and auxiliary services (650–659)

Chemical engineering (660–669)

Manufacturing (670–679)

• Society of Manufacturing Engineers
• Society of Manufacturing Engineers

Manufacturing for specific uses (680–689)

Buildings (690–699)

See also

• Category:Glossaries of science
• International Code of Botanical Nomenclature (ICBN)
• International Code of Zoological Nomenclature (ICZN)
• List of biodiversity databases
• List of biology websites
• List of botanists by author abbreviation
• List of environmental websites
• List of zoologists by author abbreviation
• Lists of animals
• Lists of environmental publications
• Lists of health topics
• Lists of nutrition topics
• Lists of scientists
• Online medical wiki encyclopedias
• User:Wavelength/About Internet & WWW/List of aids to Internet research

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