| Abbreviation | Definition |
|---|---|
| BTA | Burbank Teachers Association |
| BTA | Burnaby Teachers Association |
| BTAA | Berlin Township Athletic Association |
| BTAA | British Travelgoods and Accessories Association |
| BTAA | Business Travel Agencies Association |
| BTBA | Boston Taiwanese Biotechnology Association |
| BTBA | British Tenpin Bowling Association |
| BTEA | Bob Tebow Evangelistic Association |
| BTEA | Building Trades Employers Association |
| BTEA | Building Trades Employers' Association |
| BTFA | Bermuda Track and Field Association |
| BTFA | Body Tech Fitness Association |
| BTFA | British Tornado Foosball Association |
| BTMA | Bangladesh Textile Mills Association |
| BTMA | Bluegrass Tourism Marketing Association |
| BTMA | Boat Trailer Manufacturers Association |
| BTMA | British Tyre Manufacturers Association |
| BTMEA | Bangladesh Textiles Manufacturers and Exporters Association |
| BTNA | Barber Tract Neighborhood Association |
| BTNA | Birmingham Talking Newspaper Association |