| Abbreviation | Definition |
|---|---|
| BL | Balance Leaves |
| BLA | Bhai Log Association |
| BLAG | Brixton Linux Action Group |
| BLLA | Boutique Lifestyle Lodging Association |
| BLLA | Boutique & Lifestyle Lodging Association |
| BLNC | Business Link North Carolina |
| BLR | Business and Legal Resources |
| BLSF | Belgian Life Saving Federation |
| BLUG | Barbados Linux User Group |
| BLUG | Barrie Linux Users Group |
| BLUG | Basler Linux User Group |
| BLUG | Bhz Linux Users Group |
| BLUG | Bloomington Linux Users Group |
| BLUG | Brown Linux Users Group |
| BMA | Bangladesh Medical Association |
| BMA | Bond Market Association |
| BMA | British Medical Association |
| BMAA | Baptist Missionary Association of America |
| BMAA | Blind Manufacturers Association of Australia |
| BMOA | Balboa Merchants and Owners Association |