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Definition: AA


(1) See anti-aliasing.

(2) (Auto Answer) See modem.

(3) A telephone answering system with voice prompts. See automated attendant.

(4) (Double A) A common single-cell battery used in myriad devices from flashlights to electronic equipment of all variety. Like its triple A (AAA) cousin, it provides 1.5 volts of DC power. When used in series, the voltage is multiplied. For example, four AA batteries yield 6 volts.