# Cog

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Cog
> Markdown URL: https://mediated.wiki/source/Cog.md
> Source: https://en.wikipedia.org/wiki/Cog
> Source revision: 1320981105
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

A **cog** is a tooth of a [gear or cogwheel](/source/Gear) or the gear itself.

**Cog**, **COG**, **CoG**, or **The Cog** may also refer to:

## Science and engineering

- Rear [sprocket](/source/Sprocket) of a bicycle
- [Cog (ship)](/source/Cog_(ship)), a type of sailboat from the 10th century onward
- Center of gravity, a spatial point related to an object's [center of mass](/source/Center_of_mass)
- Cluster of Orthologous Groups of proteins; see [Sequence homology](/source/Sequence_homology#Orthology) and [MicrobesOnline](/source/MicrobesOnline)
- [Conserved oligomeric Golgi complex](/source/Conserved_oligomeric_Golgi_complex), that includes COG2, COG4, etc.
- [INSEE code](/source/INSEE_code) (also *code officiel géographique*), a numerical indexing code used by the French National Institute for Statistics and Economic Studies
- [Mount Washington Cog Railway](/source/Mount_Washington_Cog_Railway), the world's first mountain-climbing cog railway
- [OpenCog](/source/OpenCog), a project that aims to build an open source artificial general intelligence framework
- Chip on Glass; see [Liquid-crystal display](/source/Liquid-crystal_display)

## Entertainment and media

- *[C.O.G.](/source/C.O.G.)*, a 2013 American drama
- ["The Changing of the Guard" (*The Twilight Zone*)](/source/The_Changing_of_the_Guard_(The_Twilight_Zone)), a 1962 episode of the TV series *The Twilight Zone*
- ["Cog" (advertisement)](/source/Cog_(advertisement)), a British television and cinema advertisement launched by Honda
- *[Star Wars Jedi Quest 8: The Changing of the Guard](/source/Star_Wars_Jedi_Quest_8:_The_Changing_of_the_Guard)*, the eighth book in the Star Wars *Jedi Quest* series by Jude Watson
- *COG*, a 2020 novel by [Greg van Eekhout](/source/Greg_van_Eekhout)

### Fictional characters

- Coalition of Ordered Governments, a fictional organization from the [*Gears of War* series](/source/Gears_of_War_(series))
- Cogs, the fictional antagonists in the MMORPG *[Toontown Online](/source/Toontown_Online)*
- Cogs, the fictional foot soldiers of *Power Rangers'* [Machine Empire](/source/Machine_Empire)
- [Cog (comics)](/source/Cog_(comics)), a character from the *Spawn* comics

### Music

- [Cog (band)](/source/Cog_(band)), an Australian progressive rock band
- "[Changing of the Guards](/source/Changing_of_the_Guards)", a single from Bob Dylan's 1978 album *Street-Legal*
- [*The Changing of the Guard* (album)](/source/The_Changing_of_the_Guard_(album)), 2010 album by indie rock band Starflyer 59
- "Change of the Guard", a song from Steely Dan's 1972 album *[Can't Buy a Thrill](/source/Can't_Buy_a_Thrill)*
- "Changing of the Guard", a song from Exodus' 1990 album *[Impact Is Imminent](/source/Impact_Is_Imminent)*

## Organizations

- [Canberra Ornithologists Group](/source/Canberra_Ornithologists_Group), an Australian ornithological organization
- [Children's Oncology Group](/source/Children's_Oncology_Group), a National Cancer Institute supported clinical trials group
- [Church of God (disambiguation)](/source/Church_of_God_(disambiguation)), a name used by numerous, mostly unrelated Christian denominational bodies
- [Council of governments](/source/Council_of_governments), regional bodies that exist throughout the United States
- [Covenant of the Goddess](/source/Covenant_of_the_Goddess), a cross-traditional Wiccan group
- The ISO 3166-1 alpha-3 country code for [Republic of the Congo](/source/Republic_of_the_Congo)

## Other uses

- [Cog (software)](/source/Cog_(software)), an open source audio player for macOS
- [Cog (project)](/source/Cog_(project)), a project at the Humanoid Robotics Group of the Massachusetts Institute of Technology
- [Continuity of government](/source/Continuity_of_government), defined procedures that allow a government to continue its essential operations in case of catastrophe
- Changing of the Guard (or [Guard Mounting](/source/Guard_Mounting)), a formal ceremony in which sentries are relieved by their replacements
- Course over ground, the actual path followed by a vessel from A to B as determined by its [course](/source/Course_(navigation))

## See also

- [Change of gauge (disambiguation)](/source/Change_of_gauge_(disambiguation)), with various senses in the airline and rail industries
- [C0G](/source/C0G), an EIA Class 1 dielectric material with the lowest capacitance/temperature dependence
- [CoG (disambiguation)](/source/CoG_(disambiguation))
- [COGS (disambiguation)](/source/COGS_(disambiguation))
- *Coq*, in computer science, was the ancient name of [Rocq](/source/Rocq), an [interactive theorem prover](/source/Interactive_theorem_prover)
- [Kog (disambiguation)](/source/Kog_(disambiguation))
- [System Settings](/source/System_Settings), an application included with macOS
- [Settings (Windows)](/source/Settings_(Windows)), a component of Microsoft Windows

---
Adapted from the Wikipedia article [Cog](https://en.wikipedia.org/wiki/Cog) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Cog?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.