| Abbreviation | Definition |
|---|---|
| AMWU | Australian Manufacturing and Workers Union |
| AMWU | Australian Manufacturing Workers Union |
| ANU | American Nationalist Union |
| AOCU | Advantage One Credit Union |
| AOCU | Alabama One Credit Union |
| AOFU | Asia Ornamental Fish Union |
| AOU | American Ornithologist Union |
| AOU | American Ornithologists' Union |
| AOU | Area Of Union |
| APBU | Asia Pacific Broadcasting Union |
| APBU | Asian Pocket Billard Union |
| APBU | Asian Pocket Billiard Union |
| APDU | Asia Pacific Democrat Union |
| APEQ | l’Association provinciale des enseignantes et enseignants du Québec (French for QPAT) |
| APEQ | lAssociation provinciale des enseignantes et enseignants du Québec (French for QPAT) |
| APFCU | Advantage Plus Federal Credit Union |
| APFCU | Affinity Plus Federal Credit Union |
| APFCU | Allied Plastics Federal Credit Union |
| APFCU | Aloha Pacific Federal Credit Union |
| APFTU | All Pakistan Federation of Trade Unions |