| Abbreviation | Definition |
|---|---|
| AFD | Athletic Field Design |
| AFI | Athletics Federation of India |
| AFN | Athletics Federation of Nigeria |
| AGAF | Arizona Girls Athletic Foundation |
| AGT | Athletic Group Training |
| AHAT | Allied Hlth Athletic Training |
| AHSA | Acadiana Home School Athletics |
| AI | Athletic Instructor |
| AIA | Athletes In Action |
| AIAW | Association for Intercollegiate Athletics for Women |
| AIAW | Association of Intercollegiate Athletics for Women |
| AITPA | American Independent Tournament Players Association |
| AIU | Athletics Integrity Unit |
| AJAA | Avon Junior Athletic Association |
| AKC | Athletic Karate Consortium |
| ALAC | Australian Little Athletics Championships |
| ALSC | Athletic Ladies Social Club |
| AMAA | American Medical Athletic Association |
| AMS | Athletic Management System |
| AMZ | Athletic Munduan Zehar |