AEC
- 3-amino-9-ethylcarbazole
- ASEAN Economic Community
- Abstract elementary class
- Acoustic echo cancellation
- Actually existing capitalism
- Advanced Electronics Company Limited
- Aero Engine Controls
- African Economic Community
- African Energy Chamber
- Alaska Engineering Commission
- Aluminum Extruders Council
- America East Conference
- Angeles Electric Corporation
- Anger Engineering Company
- Anti-Eviction Campaign
- Architecture
- Arctic Economic Council
- Army Educational Corps
- Ars Electronica Center
- Art Ensemble of Chicago
- Asansol Engineering College
- Assam Engineering College
- Assessment and Evaluation Commission
- Assets Examination Committee
- Associated Equipment Company
- Astro AEC
- Atlantic East Conference
- Atomic Energy Commission (disambiguation)
- Attestation of College Studies
- Australian Electoral Commission
- Automatic exposure control
- Automotive Electronics Council
- Catalan Space Agency
- Construction
- Echo suppression and cancellation
- Engineering
- European Association of Conservatoires
- Facility Management
- Industry Foundation Classes
- Sa'idi Arabic
- Soil
- United States Atomic Energy Commission