| Abbreviation | Definition |
|---|---|
| BAEX | The Andersons |
| BAGS | Buenos Aires Great Southern Railway |
| BALX | Bayer Corporation |
| BANU | Bank Winter and Co |
| BANU | Bank Winter and Company Aktiengesellschaft |
| BAP | Butte, Anaconda and Pacific Railway |
| BAPU | Bechtel International |
| BAPX | Bay Area Piggyback |
| BAPX | Bay Area Piggyback Incorporated |
| BAR | Bangor and Aroostook Railroad (Montreal, Maine and Atlantic Railway) |
| BAR | Bangor and Aroostook Railroad Company |
| BARL | Bangalore Airport Rail Link |
| BARU | Barons Leasing Corporation |
| BARZ | Bangor and Aroostook Railroad (Montreal, Maine and Atlantic Railway) |
| BARZ | Bangor and Aroostook Railroad Company |
| BASF | BASF |
| BASX | Bay State Milling |
| BASX | Bay State Milling Company |
| BAWX | Babcock & Wilcox |
| BAWX | Babcock and Wilcox Company |