| Abbreviation | Definition |
|---|---|
| AAT | Asia Airfreight Terminal |
| AATA | Abstract AlgebraTheory and Applications |
| AATA | Adam and the Ants |
| AATA | Adult Apples To Apples |
| AATA | Age Appropriate Transition Assessment |
| AATA | Age Appropriate Transition Assessments |
| AATA | Archangel Ancient Tree Archive |
| AATC | Actors Anonymous Theatre Company |
| AATC | Adobe |
| AATC | Adobe Authorized Training Center |
| AATC | Alvin and the Chipmunks |
| AATC | American Aerospace Technical Castings |
| AATC | American Avionic Technologies Corporation |
| AATC | Apartment Association of Tarrant County |
| AATC | Apple Authorized Training Center |
| AATC | Asian American Theater Company |
| AATE | Advanced Affordable Turbine Engine |
| AATF | Apoptosis Antagonizing Transcription Factor |
| AATH | Aerially assisted trophy hunting |
| AATH | Association for Applied and Therapeutic Humor |