| Abbreviation | Definition |
|---|---|
| AWH | Associates in Women's Health (Wichita) |
| AWU | Australian Workers Union |
| AYU | Afghan Youth Union |
| AYU | Arab Youth Union |
| AZFCU | Arizona Federal Credit Union (Phoenix, AZ) |
| BACU | Blackhawk Area Credit Union |
| BAHK | Bangladesh Association in Hong Kong |
| BAKU | Bayerische Amateur Kickbox Union |
| BANU | Bulgarian Agrarian National Union |
| BARC | Brotherhood of American Railroad Conductors |
| BAU | beacon artist union |
| BAWP | British Association of Women Police |
| BBRU | Blue Bulls Rugby Union |
| BBSYDP | Benazir Bhutto Shaheed Youth Development Programme |
| BBU | Boston Bluegrass Union |
| BCAWU | Building, Construction and Allied Workers Union |
| BCCU | Bankstown City Credit Union |
| BCCU | Bell Community Credit Union |
| BCCU | Bellwether Community Credit Union |
| BCCU | Blackhawk Community Credit Union |