| Abbreviation | Definition |
|---|---|
| BASE | Bay Area Studio Engineering |
| BASF | Baden Aniline and Soda Factory |
| BASF | Badische Anilin- und Soda-Fabrik |
| BASG | Business Assets Sub Group |
| BASI | Beech Aerospace Service, Incorporated |
| BASIC | Benefits Administrative Services International Corporation |
| BASIS | Berry Associates Spatial Information Systems |
| BAT | Bali Adventure Tours |
| BAT | British American Tobacco |
| BATC | Bay Area Training Corporation |
| BATC | Brussels Airport Terminal Company |
| BATIS | Business And Technical Intelligence Service |
| BATX | Baidu, Alibaba, Tencent, Xiaomi |
| BAU | Bags Are Us |
| BAV | Best Audio Visual |
| BAVA | British Airways Virtual Airline |
| BAVC | BundesArbeitgegeberVerbandes Chemie e.V. |
| BAVE | Business Alliance for Vietnamese Education |
| BAVI | Bounty Agro Ventures Inc |
| BAVN | Bangor Area Visiting Nurses |