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

  • Air conditioning, technologies for altering the temperature and humidity of air
  • Alternating current, a type of electrical current in which the current repeatedly changes direction


Arts and entertainmentEdit



Other mediaEdit

  • AC Comics, a comic book publisher established in 1969
  • A.C. Slater, a fictional character in the American sitcom Saved by the Bell
  • After Colony, an alternate timeline in the Gundam metaseries for the universe of Gundam Wing
  • AC, the name of the "ultimate computer" in Isaac Asimov's novel The Last Question
  • Alien: Covenant, a 2017 science-fiction horror film by Ridley Scott.



  • AC Cars, a British specialist automobile manufacturer
  • AC Spark Plug, Delco, AC-Delco, and ACDelco, automotive parts brands owned by General Motors
  • AC Restaurants, a hotel and restaurant chain in the Benelux
  • Air Canada, the flag carrier and largest airline of Canada (IATA code AC)
  • Allis-Chalmers, a former industrial conglomerate
  • Associated Content, an online publisher and distributor of original content
  • Ayala Corporation, a holding company (Philippine Stock Exchange symbol AC)


Other organizationsEdit



Ranks, titles, and awardsEdit

Science and technologyEdit

Biology and medicineEdit


Computing and telecommunicationsEdit


Other uses in science and technologyEdit

Other usesEdit

  • Appeal Cases, or A.C., a UK law reporter covering decisions of the House of Lords, Supreme Court, Privy Council, and Court of Appeal
  • Ac (rune) (ᚪ), a rune of the Anglo-Saxon fuþorc and a continuation of the Elder Fuþark ansuz
  • Acre, a unit of area with the symbol ac
  • Advisory circular, a publication to provide guidance for compliance with airworthiness regulations
  • Ante Christum or A.C., a Latin term meaning "before Christ"
  • Anthrocon, the second largest furry convention in the world, held in Pittsburgh, Pennsylvania, US
  • Atlantic College, an international IB Diploma Programme residential Sixth Form College in the Vale of Glamorgan in Wales