| Abbreviation | Definition |
|---|---|
| ACBB | Athletic Club de Boulogne-Billancourt |
| ACCA | Association for Christian College Athletics |
| ACCA | Association of Christian College Athletics |
| ACCAC | Arizona Community College Athletic Conference |
| ACCAC | Atlantic Coast Christian Athletic Conference |
| ACE | Athletics Career Education |
| ACES | Athletic Center of Excellence in Sports |
| ACES | Athletics Culture Entertainment And Sciences |
| ACLB | Athletic Club Labastide Beauvoir |
| ACOB | Athletic College Old Boys |
| ACSIS | Athletic Conference of Singapore International Schools |
| AD | Athletic Director |
| ADAL | Art David Athletic League |
| ADCA | Athletic Directors and Coaches Association |
| ADE | Athletic Directors Edge |
| ADOD | Athletics Day Of Donors |
| AEAP | Athletic Emergency Action Plan |
| AEL | Athletic Equestrian League |
| AEN | Athletic Edge Nutrition |
| AFAA | Athletics and Fitness Association of America |