| Abbreviation | Definition |
|---|---|
| ATEC | Athletic Training Educators Conference |
| ATEL | Athletics Team Engagement Leader |
| ATHL | Athletic |
| athl | athletics |
| ATHLETE | Athletic |
| ATHS | Athletics |
| ATLAS | Athletes Training and Learning to Avoid Steroids |
| ATLAS | Athletic Training Location and Services |
| ATS | Athletic Trainer Student |
| ATSC | Athletic Training Service Center |
| ATSO | Athletic Training Student Organization |
| AU | Athletic Union |
| AVAC | Almaden Valley Athletic Club |
| AVO | Athletic Volunteer Organization |
| AVR | Athletically Varying Reset |
| AZAA | Aleph Zadik Aleph Athletics |
| BAA | Bloomington Athletic Association |
| BAA | Boston Athletic Association |
| BAAA | Boonsboro Area Athletic Association |
| BAAA | Byron Area Athletic Association |