| Abbreviation | Definition |
|---|---|
| ACHV | Athlétic Club Haute Vilaine |
| ACJC | Australian Chinese Jockey Club |
| ACKL | Adventure Club Kuala Lumpur |
| ACLA | Autobahn Club of Los Angeles |
| ACLB | Athletic Club Labastide Beauvoir |
| ACLC | Aquarium Club of Lancaster County |
| ACMB | Automobile Club du Mont Blanc |
| ACNA | Audi Club of North America |
| ACNE | Acorn Club North East |
| ACOC | Amherst College Outing Club |
| ACOC | Austin Champ Owners Club |
| ACP | Army of Club Penguin |
| ACPC | Annual Club Planning Conference |
| ACRW | Allrad Club Rhein Wied |
| ACSC | Alabaster Competitive Soccer Club |
| ACSC | Aptos Cabrillo Swim Club |
| ACSC | Asheville City Soccer Club |
| ACSC | Association Of Carolina Shag Clubs |
| ACSC | Automobile Club of Southern California |
| ACSI | Audax Club Sportivo Italiano |