| Abbreviation | Definition |
|---|---|
| ANFC | Australian National Football Council |
| APF | Arena Pro Football |
| APFA | American Professional Football Association |
| APFC | Albert Park Football Club |
| APFC | American Professional Football Conference |
| APFC | Asbury Park Football Club |
| APFL | Adelaide Plains Football League |
| APFL | American Professional Football League |
| ARF | Australian Rules Football |
| ASCFC | Association Saint Chinian Football Club |
| ASFC | Aiwan Shahi Football club |
| ASFC | All Stars Football Club |
| ASFH | All Sports Football Hotlist |
| ASFL | Alabama Spring Football League |
| ATFA | Australian Table Football Association |
| ATFA | Australian Technical Football Academy |
| ATFC | Aberystwyth Town Football Club |
| ATFC | Aldershot Town Football Club |
| ATK | Atléticó Dr Kolkata |
| AUFC | Albuquerque United Football Club |