English abbreviations from aar to aas
- AAR (After Action Review)
- AARA (Air-to-Air Refueling Area)
- AARADCOM (Army Armament Research and Development Command)
- AARC (Alberta Adolescent Recovery Center)
- AARD (Advanced Automotive Recovery Department)
- AARDA (American Autoimmune Related Diseases Association)
- AARDAC (Army Air Reconnaissance for Damage Assessment in CONUS)
- AARDAI (American Autoimmune Related Diseases Association, Inc.)
- AARGH (Artists Against Rampant Government Homophobia)
- AARI (Alcohol Advertising Reform Initiative)
- AARL (Army Aeromedical Research Lab)
- AARP (American Association of Retired Persons)
- AARS (Advanced Aerial Radiac System)
- AART (Advanced Animation and Rendering Techniques)
- AARTS (Army/American Council on Education Registry Transcript Service)
- AAS (Advanced Automation System)