| Abbreviation | Definition |
|---|---|
| AAIM | Alliance Against Intoxicated Motorists |
| AAIM | Alliance for Academic Internal Medicine |
| AAIM | American Association of Industrialized Manufacturers |
| AAIM | American Association of Integrative Medicine |
| AAIO | acute adhesive intestinal obstruction |
| AAIO | Advanced IO |
| AAIO | Alice's All In One |
| AAIO | Allergy Asthma Immunology Online |
| AAIO | Android All In One |
| AAIO | Ann Arbor Is Overrated |
| AAIO | Automated Adaptive Image Optimization |
| AAION | Arteritic anterior ischemic optic neuropathy |
| AAIP | Analogue Autoland Improvement Programme |
| AAIP | Annual Attendance Incentive Program |
| AAIP | Arena Animation International Program |
| AAIPSC | Associated Auto Insurers Plan of South Carolina |
| AAIR | Allergy Asthma Immunology of Rochester |
| AAIR | Allergy Asthma Immunology Rheumatology |
| AAIS | Ad Astra Information Systems |
| AAIS | Air to Air Interface Support |