| Abbreviation | Definition |
|---|---|
| BSNC | Berkeley Safe Neighborhoods Committee |
| BSRLM | British Society for Research into Learning Mathematics |
| BSS | The Better Stage Society |
| BTA | Bear Toad Alliance |
| BTA | Boyz Town Academy |
| BTA | Bruce Trail Association (1960 to 2009 -- now BTC) |
| BTC | Bruce Trail Conservancy |
| BTC | Bruce Trail Conservancy (Ontario) (BTA 1960 - 2009) |
| BTCG | Bridges To Common Ground |
| BTFA | Brain Tumor Foundation of America |
| BTMF | Bomb Technican Memorial Foundation |
| BTSC | Berlin Township Senior Citizens |
| BTSCC | Berlin Township Senior Citizens Center |
| BTTP | Boston Terrier Tea Party |
| BTTPR | Boston Terrier Tea Party Rescue |
| BTTW | Bricks To The World |
| BTVFC | Bethlehem Township Volunteer Fire Company |
| BUDS | Bringing Up Down Syndrome |
| BUF | Black United Fund |
| BUFMI | Black United Fund of Michigan, Inc. |