| Abbreviation | Definition |
|---|---|
| BATA | Branch Area Transit Authority |
| BATA | Brookings Area Transit Authority |
| BAUK | Braille Authority of the United Kingdom |
| BBA | Bangladesh Bridge Authority |
| BCAA | Belgian Civil Aviation Authority |
| BCDA | Bases Conversion and Development Authority |
| BCHA | Blaine County Housing Authority |
| BCHA | Boulder County Housing Authority |
| BCHA | Broward County Housing Authority |
| BCSA | British Columbia Safety Authority |
| BDA | Bintulu Development Authority |
| BEACON | Beach Erosion Authority for Clean Oceans and Nourishment |
| BEZA | Bangladesh Economic Zones Authority |
| BIAAPA | Bengaluru International Airport Area Planning Authority |
| BIPA | Business and Intellectual Property Authority |
| BIWA | Bangladesh Inland Water Transport Authority |
| BIWTA | Bangladesh Inland Water Transport Authority |
| BIWTA | Bangladesh Internal Water Transport Authority |
| BMRDA | Bangalore Metropolitan Regional Development Authority |
| BMRDA | Bengaluru Metropolitan Regional Development Authority |