| Abbreviation | Definition |
|---|---|
| AEBB | Authion Entente Basket Ball |
| AED | Awfully Easy Dive |
| AEG | Alpha Expert Gamers |
| AEGC | Alderley Edge Golf Club |
| AEK | Athlitiki Enosis Konstantinoupolis ( Greek Soccer) |
| AEL | Athlitiki Enosi Lemesou |
| AENA | All England Netball Association |
| AERC | American Endurance Ride Conference |
| AERO | Aerobic Endurance Resistance Overload |
| AESOP | Academic Enrichment and Sports Ottawa Program |
| AET | After Extra Time |
| AF | After Ford |
| AF2 | ArenaFootball 2 |
| AFA | Allentown Footbag Association |
| AFA | American Freestyle Association |
| AFAA | Aerobic and Fitness Association of America |
| AFAS | Alley Football All Stars |
| AFBJJ | Australian Federation of Brasilian Jiu Jitsu |
| AFBL | Advanced Fall Baseball League |
| AFC | Active Flow Control |