African Economic Community

Acoustic Echo Cancelling

United States Atomic Energy Commission

Atomic Energy Commission, of various countries, especially:

Associated Equipment Company, a British bus and lorry manufacturer

Art Ensemble of Chicago

Ars Electronica Center, Linz, Austria

AEC is a three-letter acronym that may refer to:

Australian Electoral Commission

Astro AEC (acronym for Asian Entertainment Channel), a Malaysian pay-TV channel

Certified Asthma Educator (AE-C)

Army Educational Corps, later the Royal Army Educational Corps

Asansol Engineering College

Association Européenne des Conservatoire, or the European Association of Conservatoires

Alliance Entertainment Corporation, a record label

Automotive Electronics Council