| Abbreviation | Definition |
|---|---|
| ASL | Air Soft League |
| ASL | American Soccer League |
| ASL | Aussie Sports Leaders |
| ASL | Average Shot Length |
| ASLL | Auburn Suburban Little League |
| ASM | Attack Success Mark |
| ASMF | Action Sports Medicine Foundation |
| ASOIF | Association of Summer Olympic International Federations |
| ASR | Additional Score Report |
| ASRA | Arizona Sports Racing Association |
| ASS | Accuracy Speed And Style |
| ASS | All Star Survivor |
| ASS | All Stars Squad |
| ASS | Aspen Skateboarding Society |
| ASSA | Alternative Sports Studies Allegiance |
| ASSC | Aerostructures Sports And Social Club |
| ASSC | All Seasons Ski Club |
| ASSC | American Shooting Sports Council |
| ASSC | Austin Sports and Social Club |
| ASSET | Assessment of Safety Significant Event Teams |