AC

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AC, A.C. or Ac may refer to:

  • Air conditioning (often referred to as aircon, AC or A/C), the process of altering the properties of air (primarily temperature and humidity) to more favourable conditions
  • Alternating current, a type of electrical current where the current repeatedly changes direction
  • Air Canada, the flag carrier and largest airline of Canada by IATA code

Computing[edit]

  • AC (complexity), a hierarchy of complexity classes found in circuit complexity
  • Authorization certificate or attribute certificate, a digital permission to use a service or resource
  • .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

Entertainment[edit]

  • AC Comics, a comic book publisher established in 1969
  • A.C. Newman, solo stage-name for Canadian musician Carl Newman
  • A.C. Slater, character in the American sitcom Saved by the Bell
  • "AC radio," 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
  • AC, the name of the ultimate computer at the end of time in Isaac Asimov's The Last Question

Video games[edit]

  • 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

Job titles and ranks[edit]

Organizations[edit]

People[edit]

Places[edit]

Science and technology[edit]

Medicine[edit]

Other uses[edit]