| Abbreviation | Definition |
|---|---|
| ANQ | Athletics North Queensland |
| AOA | Art of Athletics |
| AOB | Athletic Office Building |
| AORF | Athletic Orthopedics Research Foundation |
| APAAA | Andhra Pradesh Amateur Athletic Association (India) |
| APAC | Allen Park Athletic Club |
| APE | Athletic Performance Enhancement |
| APL | Athletic Propulsion Labs |
| APLL | Athletics Peer Learning Lab |
| ARCC | Athletic Recreation and Community Center |
| AROC | Athletic Republic of Orange County |
| ARTI | Athletic Rehabilitation Therapy Ireland |
| ASAA | Alberta Schools Athletic Association |
| ASAC | Absecon Social and Athletic Club |
| ASAC | Arkansas State Athletic Commission |
| ASAC | Arkansas State Athletic Commission's |
| ASAP | Athletic Scholars Advancement Program |
| ASWD | Athletics South Western Districts |
| ATAF | Athletic Trainers' Association of Florida |
| ATC | Athletic Training and Conditioning |