Source

Computing and information

• Source code, a file containing code for software written in a programming language
• Source theory, any process that generates successive messages in information theory
  • Communication source, objects which encode message data and transmit the information
• source (command), a UNIX command to execute commands from a file

Earth science

• Inflow (hydrology), the source of the water in a lake
• Source (hydrology), the original point from which a river or stream flows
• Source rocks, rocks that have generated, or are capable of generating hydrocarbons

Physics

• Energy sources, substances or processes with high concentrations of energy
• Current source, an electrical or electronic device that delivers or absorbs electric current
• Ion source, a device that creates atomic and molecular ions
• Light source, an object emitting light
• Sound source, an object emitting sound
• Voltage source, any device or system that produces an electromotive force between its terminals
• Source, a terminal in a field-effect transistor
• Radioactive source, a known quantity of a radionuclide which emits ionizing radiation
• Point source, a single identifiable localised source of something

Mathematics

• Source, a point where the divergence of a vector field is positive
• Source of a representation, in finite group theory

Biology

• Source tissue, plant tissue serving as a source of nutrients; for example see Somatic embryogenesis

Film and television

• The Source (1918 film), 1918 American drama directed by George Melford
• The Source (1999 film), a 1999 documentary film about the Beat generation
• The Source (2002 film), a 2002 science fiction film, also known as The Secret Craft in the UK and The Surge for its American DVD release
• The Source (2011 film), a 2011 French film
• Highlander: The Source, the fifth film in the Highlander franchise
• The Source (Charmed), a fictional character on the WB television series Charmed
• The Source, a character in the 1978 US television sitcom Quark

Radio

• The Source (network), a radio network operated in the 1970s and 1980s by NBC
• WVUR-FM or "The Source", Valparaiso University's student-run radio station

Games

• Believers of the Source, a religion in the Planescape universe
• Source (game engine), a game engine developed by Valve Corporation
• Counter-Strike: Source, a 2004 complete remake of Counter-Strike using the Source game engine
• Day of Defeat: Source, similarly a 2005 complete remake of Day of Defeat using the Source game engine

Literature

• Source (comics), a sentient entity who provides advice to the New Gods in the DC Multiverse
• Source (magazine), a bi-monthly magazine published by the John Lewis Partnership
• Source (photography magazine), a quarterly photography magazine
• The Source, a magazine of hip-hop music and culture
• The Source (novel), a 1965 novel by James A. Michener

Music

Visual arts

• Source (1/3), public artwork by U.S. artist Tony Smith
• The Source (Etrog), public artwork by artist Sorel Etrog
• The Source (Ingres), a 1856 painting by Ingres
• The Source (sculpture), an electronic moving sculpture at the London Stock Exchange