| Abbreviation | Definition |
|---|---|
| ABSA | American Bankers Service Alliance |
| ACA | African Climate Alliance |
| ACANA | Africa Cultural Alliance of North America |
| ACANA | African Cultural Alliance of North America |
| ACED | Alliance For Compassion And Education Development |
| ACES | Alliance of Civically Engaged Students |
| ACFF | Alliance for a Cavity Free Future |
| ACFF | Alliance for Cavity Free Future |
| ACFI | Alliance Cultural Foundation International |
| ACFS | Alliance for Central Florida Safety |
| ACGT | Alliance for Cancer Gene Therapy |
| ACHC | Alliance of Coalitions for Healthy Communities |
| ACI | Alliance Center for Independence |
| ACJC | Alliance of Concerned Jewish Canadians |
| ACJI | Alliance for Criminal Justice Innovation |
| ACLA | Arts and Culture Leadership Alliance |
| ACLD | Alliance Center for Leadership Development |
| ACMF | Alliance Community Medical Foundation |
| ACMSA | Allegheny County Medical Society Alliance |
| ACP | Alliance of Comprehensive Planners |