A cog is a tooth of a gear or cogwheel or the gear itself. Cog, COG, CoG, or The Cog may also refer to:

Science and engineering

* Rear

sprocket A sprocket, sprocket-wheel or chainwheel is a profiled wheel A wheel is a rotating component (typically circular in shape) that is intended to turn on an axle Bearing (mechanical), bearing. The wheel is one of the key components of the whe ...

of a bicycle *

Cog (ship) A cog is a type of ship that was used during the Middle Ages, mostly for trade and transport but also in war. It first appeared in the 10th century, and was widely used from around the 12th century onward. Cogs were Clinker (boat building), cl ...

, a type of sailboat from the 10th century onward * Center of gravity, a spatial point related to an object's

center of mass In physics, the center of mass of a distribution of mass in space (sometimes referred to as the barycenter or balance point) is the unique point at any given time where the weight function, weighted relative position (vector), position of the d ...

* Cluster of Orthologous Groups of proteins; see

Sequence homology Sequence homology is the homology (biology), biological homology between DNA sequence, DNA, RNA sequence, RNA, or Protein primary structure, protein sequences, defined in terms of shared ancestry in the evolutionary history of life. Two segments ...

and MicrobesOnline * Conserved oligomeric Golgi complex, that includes COG2, COG4, etc. *

INSEE code The INSEE code ( ) is a numerical indexing code used by the Institut national de la statistique et des études économiques (France), French National Institute for Statistics and Economic Studies (INSEE) to identify various entities, including c ...

(also ''code officiel géographique''), a numerical indexing code used by the French National Institute for Statistics and Economic Studies *

Mount Washington Cog Railway The Mount Washington Cog Railway, also known as the Cog, is the world's first mountain-climbing Rack railway, cog railway (rack-and-pinion railway). The railway climbs Mount Washington in New Hampshire, United States. It uses a Rack railway#Mar ...

, the world's first mountain-climbing cog railway *

OpenCog OpenCog is a project that aims to build an open source artificial intelligence framework. OpenCog Prime is an architecture for robot and virtual embodied cognition that defines a set of interacting components designed to give rise to human-equiva ...

, a project that aims to build an open source artificial general intelligence framework * Chip on Glass; see

Liquid-crystal display A liquid-crystal display (LCD) is a flat-panel display or other Electro-optic modulator, electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers to display information. Liq ...

Entertainment and media

* '' C.O.G.'', a 2013 American drama * "The Changing of the Guard" (''The Twilight Zone''), a 1962 episode of the TV series ''The Twilight Zone'' * "Cog" (advertisement), a British television and cinema advertisement launched by Honda * '' 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

Fictional characters

* Coalition of Ordered Governments, a fictional organization from the ''Gears of War'' series * Cogs, the fictional antagonists in the MMORPG ''

Toontown Online ''Toontown Online'', commonly known as ''Toontown'', was a 2003 massively multiplayer online role-playing game (MMORPG) based on a cartoon animal world, developed by Disney's Virtual Reality Studio and Schell Games, and published by The Walt ...

'' * Cogs, the fictional foot soldiers of ''Power Rangers''

Machine Empire ''Power Rangers Zeo'' is a television series and the fourth season of the ''Power Rangers'' franchise, based on the 19th Super Sentai series '' Chouriki Sentai Ohranger''. It is the continuation of ''Mighty Morphin Power Rangers'' and aired in 1 ...

* Cog (comics), a character from the ''Spawn'' comics

Music

Cog (band) Cog are an Australian progressive rock band that formed in 1998. Their debut album, ''The New Normal (album), The New Normal'', was nominated for Triple J's 2005 J Award. The band's music is influenced by Tool (band), Tool,Changing of the Guards", a single from Bob Dylan's 1978 album ''Street-Legal'' * ''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 ''Can't Buy a Thrill'' is the debut studio album by American rock band Steely Dan, released in November 1972, by ABC Records. It was written by band members Walter Becker and Donald Fagen, and recorded in August 1972 at the Village Recorder ...

'' * "Changing of the Guard", a song from Exodus' 1990 album ''

Impact Is Imminent ''Impact Is Imminent'' is the fourth studio album by American thrash metal band Exodus, released on July 10, 1990. This was Exodus' first album on Capitol Records as well as their first album to feature John Tempesta on drums. It was also the las ...

Organizations

Canberra Ornithologists Group The Canberra Ornithologists Group (COG) was founded on 15 April 1970 when the ACT branch of the Royal Australasian Ornithologists Union (RAOU) became defunct following drastic reform within the RAOU in the late 1960s which abolished all its branc ...

, an Australian ornithological organization *

Children's Oncology Group The Children's Oncology Group (COG), a clinical trials group supported by the National Cancer Institute (NCI), is the world's largest organization devoted exclusively to pediatric cancer research. The COG conducts a spectrum of clinical research ...

, a National Cancer Institute supported clinical trials group *

Church of God (disambiguation) Church of God is a name used by numerous denominational bodies. The largest denomination with this name is the Church of God (Cleveland, Tennessee). Adventist Churches of God * Church of God General Conference (Church of God of the ...

, a name used by numerous, mostly unrelated Christian denominational bodies *

Council of governments A council is a group of people who come together to consult, deliberate, or make decisions. A council may function as a legislature, especially at a town, city or county/shire level, but most legislative bodies at the state/provincial or nation ...

, regional bodies that exist throughout the United States *

Covenant of the Goddess The Covenant of the Goddess (CoG) is a cross-traditional Wiccan group of solitary Wiccan practitioners and over one hundred affiliated covens (or congregations). It was founded in 1975 in order to increase co-operation among witches and to secure ...

, a cross-traditional Wiccan group * The ISO 3166-1 alpha-3 country code for

Republic of the Congo The Republic of the Congo, also known as Congo-Brazzaville, the Congo Republic or simply the Congo (the last ambiguously also referring to the neighbouring Democratic Republic of the Congo), is a country located on the western coast of Central ...

Other uses

Cog (software) Cog is an open source audio player for macOS. The basic layout is a single-paned playlist interface with two retractable drawers, one for navigating the user's music folders and another for viewing audio file properties, like bitrate. Along with ...

, an open source audio player for macOS * Cog (project), a project at the Humanoid Robotics Group of the Massachusetts Institute of Technology *

Continuity of government Continuity of government (COG) is the principle of establishing defined procedures that allow a government to continue its essential operations in case of a catastrophic event such as nuclear war. Continuity of government was developed by the Br ...

, defined procedures that allow a government to continue its essential operations in case of catastrophe * Changing of the Guard (or 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