| Abbreviation | Definition |
|---|---|
| ACORN | Abandoned Children and Orphans Resource Network |
| ACOSA | Association for Community Organization and Social Administration |
| ACPA | American Chronic Pain Association |
| ACPC | American Committee for Peace in Chechnya |
| ACPC | American Council for Polish Culture |
| ACPC | Annual Conference Program Committee |
| ACPCA | American Cleft Palate- Craniofacial Association |
| ACPCAFV | American Campaign for Prevention of Child Abuse and Family Violence |
| ACPM | American College of Project Managers |
| ACPRC | Arthritis and Cancer Pain Research Center |
| ACR | Alley Cat Rescue |
| ACRA | Allegheny County Retirees Association |
| ACRA | American Cultural Resources Association |
| ACRC | Advanced Cancer Research Center |
| ACRD | Alliance for Community Research and Development |
| ACRD | Assam Centre for Rural Development |
| ACRE | American Council For Renewable Energy |
| ACRES | Audubon Center For Research Of Endangered Species |
| ACRF | AHEPA Cancer Research Foundation |
| ACRF | Akron-Canton Regional Foodbank |