| Abbreviation | Definition |
|---|---|
| ADE | Association Des Eleves |
| ADF | Airline Dispatchers Federation |
| ADT | Alianza Del Trabajo |
| AECE | Association of Engineering Construction Employers |
| AECU | Academic Employees Credit Union |
| AECU | Atomic Employees Credit Union |
| AEEU | Amalgamated Engineering and Electrical Union |
| AESA | Assam Engineering Service Association |
| AESU | Air-transport Executive Staff Union |
| AEU | Advanced European Union |
| AEU | American Ethical Union |
| AEU | Association Employees Union |
| AEU | Athletic Employees Union |
| AFCS | Alliance For Cellular Signalling |
| AFCU | Aerospace Federal Credit Union |
| AFCU | Aldersgate Federal Credit Union |
| AFCU | Allentown Federal Credit Union |
| AFCU | America First Credit Union |
| AFCU | Anderson Federal Credit Union |
| AFCU | Arizona Federal Credit Union |