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Look up AC, ac in Wiktionary, the free dictionary.

AC may refer to any of the following, broken down by subject area.

Science

• Actinium (Ac), a chemical element
• Acetaldehyde (also Ac), an organic ion
• Acetate (also Ac), an organic ion
• Acetyl (Ac), a functional group in chemistry
• Acromioclavicular joint in humans and other animals, frequently injured in sport
• Adenylate cyclase, an enzyme
• Alpha Centauri, a star system in the constellation Centaurus
• Alternating current, a type of electric current
  • AC power, a net transfer of energy over a complete cycle of the alternating current waveform
• Anterior commissure, a small bundle of nerve fibres that connect the right and left temporal lobes
• Anticipated convection, the code for severe thunderstorm forecasts issued daily for the contiguous U.S. by the Storm Prediction Center
• Armored Cable, a type of power cable used by electricians
• Artificial consciousness
• Astrographic Catalogue, a star catalogue
• attocoulomb (aC), an SI unit of electric charge
• Axiom of choice, a mathematical set theory concept

Places

• Aachen - a German city, using AC as number plate code
• Acre (state) - a Brazilian state, using AC as abbreviation.
• Atlantic City, a Coastal City in New Jersey, U.S., known for its boardwalk, casino gambling, sandy beaches, and the inspiration for the board game Monopoly

Computing

• AC (complexity), a hierarchy of complexity classes found in circuit complexity
• .ac, Internet top-level domain name for Ascension Island
• .ac (second level), Internet second-level domain used to denote academic institutions in many countries
• Anonymous Coward, in the Slashdot online environment
• Authorization certificate or attribute certificate, a digital permission to use a service or resource
• Arctic Cooling, a Swiss manufacturer of heatsinks, cooling fans and computer cases.
• Auto clickers, which are commonly referred to in MMORPGs as ACs.

Transportation

• AC Cars, a brand of automobile
• AC Cobra, an Anglo-American sports car
• AC Propulsion a producer of electric vehicle drive systems in San Dimas, California, USA
• AC Schnitzer, an aftermarket tuner of BMW automobiles
• Hyundai Aero City, a bus built by the Hyundai Motor Company
• Air Canada, as its IATA airline designator
• Aircraft (usually A/C)
• Algoma Central Railway, a now out-of-service railway in Northern Ontario, Canada
• AC Transit, a public bus transit system in Oakland, California

Job titles / ranks

• Aircraftman
• Assistant Commissioner of Police of the Metropolis
• Aelod y Cynulliad, the title for Members of the National Assembly for Wales

People

• Aaron Carter, American pop singer/rapper
• Adam Carolla, American radio personality and comedic actor/host
• Aleister Crowley, in "magickal" contexts
• Alice Cooper, hard rock, shock rock, and heavy metal singer
• Anderson Cooper, Journalist
• Alan Cox, Linux kernel developer
• Austin Carr, former NBA player
• A. C. Bhaktivedanta Swami Prabhupada, founder of the International Society for Krishna Consciousness
• A.C. Green, former NBA player

Sports

• Associazione Calcio (Italian for "Football (soccer) Association"), an identifier frequently found in the names of football clubs in Italy, most notably:
  • A.C. Milan, one of the most storied clubs in that country
• Athletic Club
• Abbreviation for Athletic club

Entertainment

• The name of the ultimate computer at the end of time in Isaac Asimov's The Last Question
• After Colony, an alternate timeline in the Gundam metaseries for the universe of Gundam Wing
• Albert Clifford "A.C." Slater, a character in the American sitcom Saved by the Bell
• "Alt Cataclius" or "After Cataclysm", a historical era in the timeline for the Dragonlance fictional universe
• Armor Class, a combat-related parameter in the Dungeons & Dragons role playing game system
• Final Fantasy VII Advent Children, a movie sequel to the game Final Fantasy VII
• Arthur Curry, who goes by his initials during an appearance on Smallville

Video games

• Animal Crossing (series), a series of real-time village simulations by Nintendo
• Assassin's Creed, a platformer/stealth game for the Microsoft Windows, Xbox 360, PlayStation 3, and Nintendo DS platforms.
• Armored Core, a video game series featuring the eponymous robotic fighter under the player's control.
• Asheron's Call, a fantasy massively multiplayer online role-playing genre
• The Ace Combat series of combat flight simulator games
• "AC" is sometimes used as an abbreviation for "arcade". Therefore, it is often used as a suffix to designate a new or separate version of a game, or even merely as the abbreviation for a revision:
  • Melty Blood: Act Cadenza, a two-dimensional fighting game featuring characters from Tsukihime
  • Guilty Gear XX Accent Core, a two-dimensional fighting game, part of the Guilty Gear series
  • Tekken 5 on the PlayStation 2 features a mode that allows one to play the arcade versions of Tekken, Tekken 2, and Tekken 3, labeled "AC"
• Alliance Character as used by Horde players in the MMORPG World of Warcraft
• Arvoch Conflict, a shareware flight simulator by Star Wraith 3D Games
• Ace Combat, a series of flight/combat games by Namco.

Music

• AC/DC, a rock group
• Adult contemporary music, a music genre also used to describe broadcast radio stations
• Animal Collective, an experimental musical collective.
• Anal Cunt, a grindcore band.

Organizations

• Anglican Communion
• Akademikernes Centralorganisation, the Danish Confederation of Professional Associations.
• Civic Alliance Foundation, a Romanian NGO.
• Astronomy club, common in schools and tertiary institutions.
• Ad Council
  • Japan Ad Council
• Ayala Corporation, via its ticker symbol "AC".
• Asociación Civil, a title for non profit organizations in Spanish speaking countries.

Schools

• Atlantic College, one of the twelve United World Colleges.
• Abbreviation for Assumption College located in Worcester, Massachusetts USA.
• Abbreviation for Aquinas College located in Perth, Western Australia.

Miscellaneous

• Another name for the Ansuz rune
• Air conditioning (and air conditioner), the mechanical process of cooling air in enclosed spaces
• Ante Christum, (AC), Latin meaning "before Christ" or BC
• Anthrocon, a furry fandom convention
• Antichrist, in the Christian religion
• Average cost, in economics
• post-nominal AC Order of Australia, Companion
• Naval auxiliary ship serving as a collier (Auxilary Collier) in the U.S. Navy's list of hull classifications

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.