| Abbreviation | Definition |
|---|---|
| B.O. | By Other |
| BAAD | Bunch of Architects and Designers |
| BAB | Bicycle Architecture Biennale |
| BAC | Boston Architectural College |
| BACE | Business Architecture Construction and Engineering |
| BAEA | Berger Award for Excellence in Architecture |
| BAHA | Berkeley Architectural Heritage Association |
| BAHC | Brighton Architectural Heritage Committee |
| BAJA | Building Automation Java Architecture |
| BAL | British Architecture Library |
| BAP | Building Architect Plus |
| BAR | Bogus Architectural Rift |
| BARB | Bluetooth Architecture Review Board |
| BAS | Building Automated System |
| BAT | Building Advisory Team |
| BAT | Building Architect Tool |
| BAUA | Baltic Architects unions association |
| BAWG | Business Architecture Working Group |
| BBA | Berenblum Busch Architecture |
| BBG | Brennan Beer Gorman |