AC

AC may stand for:

• In electricity, AC is the abbrevation of alternating current.
• AC is an automobile brand, see AC Cars
• AC can refer to an Anonymous Coward on Slashdot
• AC can also means ante christum, that is to say before Christ
• AC refers to a chemotherapy regime comprising adriamycin and cyclophosphamide
• Ac is the chemical symbol for actinium
• AC can be short for Atlantic College, one of the ten United World Colleges

In Issac Asimov's "The Last Question", a short story, AC is the ultimate computer at the end of time.