| Abbreviation | Definition |
|---|---|
| BAM! | Baird Artists Management |
| BAMH | Brent Aguilar Media House |
| BAMR | British Allied Manufacturers Representatives |
| BANSEA | Business Angel Network South East Asia Ltd |
| BAO | Bruce Artwick Organisation |
| BAPCO | Business Application Performance Corporation |
| BAPI | Bapbuilding Automation Products Inc |
| BAPI | Building Automation Products Inc |
| BAPLC | Bangladesh Association of Publicly Listed Companies |
| BAPS | Bombardier aerospace procedural standards |
| BAR | Brown And Root |
| BARB | Broadcasters' Audience Research Board, LTD. |
| BARC | Bio Arts Research Corporation |
| BARE | Bay Area Real Estate, Inc. |
| BARS | Background Asia Risk Solutions |
| BART | Bay Area Rapid Transit |
| BAS | Business Audio Source |
| BASAL | Banc of America Securities Asia Limited |
| BASC | Brockport Auxiliary Service Corporation |
| BASC | Brockport Auxiliary Services Corporation |