Look up Signal, signal, signals, signaling, or signalling in Wiktionary, the free dictionary.

A signal is any variation of a medium that conveys information.

Signal or signaling may refer to:

Science and technology

• Analog signal
• Audio signal
• Digital signal
  • Digital signal (signal processing)
• Cell signaling, in biology
• Signalling (economics), in economics theory
• Signal processing, subfield of electrical engineering
• Signalling theory, in evolutionary biology
• Time signal

Computing

• SIGNAL (programming language), a synchronous programming language
• Signal (messaging app), an end-to-end encrypted voice calling, video calling and instant messaging application
  • Signal Protocol, a cryptographic protocol used by the Signal application
• Signal (IPC), a form of inter-process communication used in Unix and related operating systems
  • C signal handling, a way for handling signals received by programs during their execution
• A term in functional reactive programming

Communications

• Military communications, often called "signals"
• Recognition signal in human, technical or biological communications
• Signaling protocol to establish or tear down a connection, and to identify the state of the connection
• Signaling (telecommunications), a part of some communication protocols
• Smoke signal, an ancient form of communication
• Telegraphic signal, in telegraphy

Communication for transport

• International Code of Signals, a standard for sending signals by displaying flags
  • Maritime flag signalling, generally flaghoist signalling, by which ships communicate with each other
  • Naval flag signalling, covers various forms of flag signalling, such as semaphore or flaghoist
• Railway signal
• Traffic light

Arts and entertainment

• Signal (magazine), a Wehrmacht propaganda magazine which was published in occupied Europe during World War II
• SIGNAL (US magazine), publication of the Armed Forces Communications and Electronics Association
• Signal, a New York Yiddish-language literary monthly published from 1933 to 1936 by the Communist Party USA
• Signal (novel), a 2009 children's novel about a boy who helps a girl from another planet signal her parents
• Signal (South Korean TV series), a 2016 South Korean police procedural TV series
• Signal (Japanese TV series), a 2018 Japanese police procedural TV series based on the 2016 South Korean series of the same name
• Signal – The Southeast Electronic Music Festival, an annual music festival held in the US
• Signal, Wyoming, a fictional town from the 2005 film Brokeback Mountain
• "Signals", a 2005 episode of the animated television series 12 oz. Mouse

Music

• Signal (band), a Bulgarian rock band

Albums

• Signal (album), a 2005 album by Casiopea
• Signals (Mal Waldron album), 1971
• Signals (Mallory Knox album), the début album of the Mallory Knox band
• Signals (Rush album), 1982
• Signals (Wayne Krantz album), 1990
• Signals, an album by American band Devour the Day
• Signal (EP), a 2017 extended play by South Korean girl group Twice

Songs

• "Signal" (KAT-TUN song), a 2006 Japanese song by KAT-TUN
• "Signal" (Twice song), a song recorded by South Korean girl group Twice
• "Signal", a song by General Degree
• "Signal", a single by Stan Getz
• "Signal", a song from the 2006 Bollywood film Bhagam Bhag
• "Signal", a song by Sara Groves from the album Floodplain

Places

United States

• Signal, Arizona, a ghost town
• Signal, Missouri, a ghost town
• Signal, Ohio, an unincorporated community

Organizations

• Signal Systems, a telecommunications company of the McLean Group of Companies
• Signal Foundation, a non-profit organization

Other uses

• Signal (bridge), a permitted means of conveying information to partner through the play of cards in contract bridge
• Citation signal, in law
• Signal (toothpaste)
• USS Signal, several US Navy ships
• Signal corps, military branch responsible for military communications

See also

• Cignal
• Digital signal (disambiguation)
• Signaal, former name of the Dutch defense company Thales Nederland
• Signal 1, a radio station
• Signal 2, a radio station
• The Signal (disambiguation)
• Signal Mountain (disambiguation)
• Virtue signalling, the conspicuous expression of moral values

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