AC

For the Wikipedia editing policy, see Wikipedia:AC.

AC or Ac may refer to:

• Air conditioner, a machine that produces cool air
• Air conditioning, the mechanical process of cooling air in enclosed spaces
• Anarcho-capitalism, a form of free-market anarchism
• Ante Christum or A.C., a Latin term meaning "before Christ"
• Anthrocon, the largest furry convention in the world held in Pittsburgh, Pennsylvania
• Assessment center, a process to evaluate candidates for a job
• Average cost, in economics
• Acre, a unit of area with the symbol ac

Science

• AC power, a net transfer of energy over a complete cycle of the alternating current waveform
• Acetyl, a functional group in chemistry
• Acromioclavicular joint (AC joint), the shoulder junction between the scapula and the clavicle
• Actinium, a chemical element
• Adenylate cyclase, a lyase enzyme
• Alternating current, a type of electric current
• Anticipated convection, convective outlooks issued by the U.S. National Weather Service
• Artificial consciousness, a field related to artificial intelligence and cognitive robotics
• Axiom of choice, a mathematical set theory concept
• Chemotherapy regimens, adriamycin and cyclophosphamide, a chemotherapy regimen used to treat breast cancer
• Altocumulus, a medium level cloud type

Places

• Aachen (district) (vehicle registration code AC), a district in Germany
• Acre (state), a state in Brazil
• Atlantic City, New Jersey, a city in New Jersey, United States

Computing

• AC (complexity), a hierarchy of complexity classes found in circuit complexity
• .ac, Internet top-level domain name for Ascension Island
• .ac (second-level domain), Internet second-level domain used to denote academic institutions in many countries
• Authorization certificate or attribute certificate, a digital permission to use a service or resource

Job titles / ranks

• A person appointed Companion Of The Order of Australia
• Aelod y Cynulliad, the title for Members of the National Assembly for Wales
• Aircraftman, an air forces rank
• Assistant Commissioner of Police of the Metropolis, a rank in London's Metropolitan Police

Entertainment

• AC, the name of the ultimate computer at the end of time in Isaac Asimov's The Last Question
• A.C. Newman, solo stage-name for Canadian musician Carl Newman
• A.C. Slater, character in the American sitcom Saved by the Bell
• AC Comics, a comic book publisher established in 1969
• Adult contemporary music, a genre description used mainly in radio broadcasting
• After Colony, an alternate timeline in the Gundam metaseries for the universe of Gundam Wing
• American Capitalist, the third studio album from American rock band 5FDP
• Anal Cunt, an American musical group
• Armor Class, a combat-related parameter in the Dungeons & Dragons role playing game system

Video games

• Ace Combat, a series of combat flight simulator games
• Armored Core, a series featuring the eponymous robotic fighter under the player's control
• Asheron's Call, a fantasy massively multiplayer online role-playing game
• Assassin's Creed, a series of historical sci-fi action/adventure games
• Assault Cube, a free first-person shooter with pseudo-realistic gameplay, optimised for lower-end computers
• Animal Crossing, a life simulation game made by Nintendo
• Batman Arkham City

Organizations

• AC Cars, a British specialist automobile manufacturer
• AC – The Danish Confederation of Professional Associations, an umbrella organisation for several Danish trade unions
• AC Transit, a regional public transit agency in the San Francisco Bay Area
• Action Congress, a political party in Nigeria
• Ad Council Japan (AC Japan), an organization that distributes Japanese public service announcements
• Air Canada (IATA code), an airline company
• Alternative for Change (Alternativa por el Cambio), a political party in Nicaragua
• Associated Content, an online publisher and distributor of original content
• Australia Council
• Ayala Corporation (Philippine Stock Exchange symbol), a holding company
• Civic Alliance Foundation (Alianţa Civică), a Romanian non-governmental organization
• Coast Alliance (Alianza Costeña), a former regional political coalition in Nicaragua

Law

• Appeal cases