Signal (disambiguation)

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

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