| Abbreviation | Definition |
|---|---|
| AOK | Across Otago Kneebuilder |
| AOL | Aggregation Of Losses |
| AOL | All Outa Luck |
| AOSSM | American Orthopaedic Society for Sports Medicine |
| AP | Ability Points |
| AP | Action Points |
| AP | All Pain |
| AP | Annual Pass |
| AP | Assisted Play |
| APA | Acolytes Protection Agency |
| APA | African Paddling Association |
| APA | American Poolplayers Association |
| APA | Average Points Against |
| APB | All Purpose Bicycle |
| APBA | American Professional Baseball Association |
| APC | Active Participation Clause |
| APC | Adoptable Player Character |
| APC | Americas Paralympic Committee |
| APC | Associated Player Character |
| APC | Association Professional Cycliste |