| Abbreviation | Definition |
|---|---|
| AACEFCU | Anne Arundel County Employees Federal Credit Union |
| AACFCU | Army Aviation Center Federal Credit Union |
| ABCU | Association of British Credit Unions |
| ABCU | Auto Body Credit Union |
| ABECU | Anheuser-Busch Employees Credit Union |
| ABMT | Account Based Money Transfer |
| ACCU | Alabama Central Credit Union |
| ACCU | Alabama Community Credit Union |
| ACFCU | Atlantic Coast Federal Credit Union |
| ACU | Allco Credit Union |
| ACU | Alliance Credit Union |
| ACU | Arrowhead Credit Union |
| ACUA | Alabama Credit Union Administration |
| ACUIC | Associate of the Credit Union Institute of Canada |
| ACUL | Alabama Credit Union League |
| ADCU | Additional Deduction for Credit Unions |
| ADCU | Association of DuPont Credit Unions |
| ADCU | Australian Defence Credit Union |
| AECU | American Eagle Credit Union |
| AEFCU | Albany Employees Federal Credit Union |