System (disambiguation)

Last updated July 19, 2025

A system is a set of entities, real or abstract, comprising a whole.

Science and technology

Biological system, a complex network of biological entities, for instance, a group of organs
Ecosystem, an entity comprising a large number of organisms and their environment
Energy system, an interpretation of the energy sector in system terms
Binary system (disambiguation), term is used for multiple purposes, such as:
- Binary system (astronomy), a system of two celestial bodies on a mutual orbit
Star or stellar system, is a system of any multiple number of stars
Planetary system, gravitationally bound non-stellar objects in or out of orbit around a star or star system
Satellite system (astronomy), is a set of gravitationally bound non-planetary objects in orbit of a planetary mass object or minor planet, or its barycenter
Ring system, is a system of cosmic dust or moonlets, forming rings around, and gravitationally bound to a host non-stellar body.
Physical system, that portion of the physical universe chosen for analysis
Thermodynamic system, a body of matter and/or radiation, confined in space by walls, with defined permeabilities, which separate it from its surroundings
Systems science, an interdisciplinary field that studies the nature of complex systems in nature, society, and science
System (stratigraphy), a unit of the geologic record of a rock column
Systems engineering, a field about design, integration, and management of complex systems
System of equations, a set of mathematical equations

Computer system, the combination of hardware and software which forms a complete, working computer
- Operating system
system, a C process control function in the C Standard Library used to execute subprocesses and commands
System (typeface), a raster font packaged with Microsoft Windows

Economic system, covering the production and distribution of goods and services
Social system, based on the interrelationships between individuals, groups, and institutions

System (music notation), a collection of staves to be played simultaneously
System (Seal album), a 2007 album by Seal
"System", a song by Chester Bennington from the Queen of the Damned soundtrack
"System", a song by Jonathan Davis on his 2007 album Alone I Play
"System", a song by Labelle on their 2008 album Back to Now
"System", a song by Reks on his 2009 album More Grey Hairs
System, a Danish electronic trio consisting of Anders Remmer, Jesper Skaaning, and Thomas Knak
System of a Down, an Armenian-American heavy metal band also known as "System"

System (journal), a scientific journal
System (magazine)
When talking about plurality or multiplicity, "system" can be used to refer to all personas (or "headmates") present in a single body, taken together as a group.