Source

• Historical source
• Source (intelligence) or sub source, typically a confidential provider of non open-source intelligence
• Source (journalism), a person, publication, publishing institute or other record or document that gives information
• Source document, a document in which data collected for a clinical trial is first recorded
• Source text, in research (especially in the humanities), a source of information referred to by citation
  • Primary source, a first-hand written evidence of history made at the time of the event by someone who was present
  • Secondary source, a written account of history based upon the evidence from primary sources
  • Tertiary source, a compilation based upon primary and secondary sources
• Sources (website), a directory of expert contacts and media spokespersons
• Open source, a philosophy of dissemination of intellectual products

• Sources of international law, the materials and processes out of which the rules and principles regulating the international community are developed
• Sources of law, the materials and processes out of which law is developed

• Sources and sinks a general mathematical analogy used in science
• Source of a morphism
• Source, a point where the divergence of a vector field is positive
• Source of a representation, in finite group theory
• Source, a terminal in a field-effect transistor
• Current source, an electrical or electronic device that delivers or absorbs electric current
• Energy sources, substances or processes with high concentrations of energy
• Ion source, a device that creates atomic and molecular ions
• Light source, an object emitting light
• Point source, a single identifiable localised source of something
• Radioactive source, a known quantity of a radionuclide which emits ionizing radiation
• Sound source, an object emitting sound
• Voltage source, any device or system that produces an electromotive force between its terminals

• Source (command), a UNIX command to execute commands from a file
• Communication source, objects which encode message data and transmit the 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
• Source (programming language), a family of sublanguages of JavaScript to support Structure and Interpretation of Computer Programs, JavaScript Adaptation

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

Fictional entities

• Source (comics), a sentient entity who provides advice to the New Gods in the DC Multiverse

Games

• Source (game engine), a game engine developed by Valve
  • Source 2, the successor to Source
• Counter-Strike: Source, a 2004 complete remake of Counter-Strike using the Source game engine
• Day of Defeat: Source, a 2005 complete remake of Day of Defeat using the Source game engine

Music

• Source (album), a 2020 album by Nubya Garcia, or the title song
• Source, a 2003 album by the Duskfall
• "Source", a song by Tycho from his 2016 album Epoch

Periodicals

• Source (lifestyle magazine), a bi-monthly magazine published by the John Lewis Partnership
• Source (photography magazine), a quarterly photography magazine
• Sources: A Journal of Jewish Ideas, published by the Shalom Hartman Institute

Visual arts

• Source (1/3), public artwork by U.S. artist Tony Smith

• Source (UNSW), a community service provider that used to operate at the University of New South Wales in Sydney, Australia
• Source Family (1922-1975), a commune outside of 1970's Hollywood
• Source Vagabond Systems, an Israeli manufacturer using the brand "SOURCE"

• natural spring
• headwaters
• Les Sources (English: Sources), Estrie, Quebec, Canada; a regional county municipality
• Des Sources station (English: Sources station), Montreal, Quebec, Canada; a light rail station
• Boulevard Des Sources (English: Sources Boulevard), Montreal, Quebec, Canada; a large street

• Operation Source, a series of attacks on German warships in 1943
• Absolute (philosophy), or the source, as the absolute principle of being