| 3PM | Third Party Marketers Association | |
| AACU | Association of American Colleges and Universities | |
| AAPA | Asian American Psychological Association | |
| AAPS | Association of American Physicians and Surgeons | |
| AARA | Asian American Retailers Association | |
| ABCAP | Association of British Coumbia Animation Producers | |
| ABDG | American Business Development Group | |
| ABTA | Asia Business Trade Association | |
| ACA | Association of Canadian Advertisers | |
| ACCW | Advocates for Covenant Clergy Women | |
| ACF | Alliance of Canadian Franchisees | |
| ACMA | American Composites Manufacturers Association | |
| ACPPA | American Concrete Pressure Pipe Association | |
| AEBIOM | European Biomass Association | |
| AEKI | Asosiasi Eksportir Kopi Indonesia | |
| AETA | American Equestrian Trade Association | |
| AFAREM | La Asociación de Fabricantes de Áridos de la Región de Murcia | |
| AFPA | Alberta Forest Products Association | |
| AFSN | Adoptive Family Support Network | |
| AFTA | American Free Trade Association | |
| AGFC | Arkansas Game and Fish Commission | |
| AIFD | American Institute of Floral Designers | |
| ALCS | American Lumber Standards Committee | |
| AMEA | Alabama Municipal Electric Authority | |
| AMEA | Association of Machinery and Equipment Appraisers |
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