AC

AC may stand for:

• in electricity, the abbreviation of alternating current
• in history, Latin ante Christum, that is to say before Christ; see Anno Domini
• in medicine, a chemotherapy regime comprising adriamycin and cyclophosphamide, see AC chemotherapy
• in mathematics (specifically: set theory) for the axiom of choice
• Atlantic College, one of the ten United World Colleges
• an automobile brand, see AC Cars
• adult contemporary music
• the chemical symbol for actinium, Ac (not AC unless misprinted)
• historically, as a symbol (Ac or AC) for the acetate ion in chemical formulas
• an Anonymous Coward on Slashdot
• the postnominal letters for the Companion in the Order of Australia
• Air Canada
• Ascension Island
• air conditioning
• Alt Cataclius, "After Cataclysm" on the Dragonlance Timeline.
• in Dungeons and Dragons, the abbreviation of Armor Class.
• Asheron's Call, a fantasy MMORPG
• Algoma Central Railway (AAR reporting mark AC)
• In British politics AC, which stands for Aelod Cynulliad is the Welsh language equivalent of Assembly Member or AM, denoting a member of the National Assembly for Wales.
• Associación Civil, (civil association), a title for non profit organizations in Spain
• The grindcore band Anal Cunt.
• In Isaac Asimov's "The Last Question", a short story, AC is the ultimate computer at the end of time.
• In The Armoured Core series, ACs are the robotic fighters you conrol.
• Anthrocon, a furry fandom convention.
• The AC = AntiChrist
• In computer security, an authorization certificate or attribute certificate is a digital permission to use a service or a resource.

See also

• AC/DC