| Abbreviation | Definition |
|---|---|
| BTNA | Butler Tarkington Neighborhood Association |
| BTPA | Baby TALK Professional Association |
| BTPA | Badger Truck Pullers Association |
| BTPA | Bowen Therapy Professional Association |
| BTRA | Brighton Trail Riders Association |
| BTTA | Barcelona TEFL Teachers Association |
| BTTA | Brentwood Towers Tenants Association |
| BTVA | Belux Tobacco Vending Association |
| BTWA | Belgian Turkish Women Association |
| BTWA | Buffalo Trail Water Association |
| BUA | Balkan Universities Association |
| BUAA | Boston University Athletic Association |
| BUAA | Brandon University Alumni Association (Canada) |
| BUBA | British Universities in Brunei Association |
| BUCA | British Universities Chess Association |
| BUDA | Birmingham Ultimate Disc Association |
| BUEA | Bloomington Urban Enterprise Association |
| BUJA | Binghamton University Japanese Association |
| BUKA | British Union of Karate Associations |
| BULA | Black Undergraduate Law Association |