Source

Last updated August 12, 2025

Source may refer to:

Research

Historical document
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

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

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

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

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