| Abbreviation | Definition |
|---|---|
| BCYU | Bay Cities Leasing Company |
| BDCX | Anchor Glass Container |
| BDCX | Diamond Bathurst (Anchor Glass Container) |
| BDKD | Bhandarkund |
| BDLX | Badger Lumber (BDL Company) |
| BDLX | BDL Company |
| BDMX | Blue Diamond Mining |
| BDMX | Blue Diamond Mining Incorporated |
| BDNX | Baroid Drilling Fluids |
| BDNX | Baroid Drilling Fluids Incorporated |
| BDR | The Baltimore Industrial Railroad |
| BDRV | Belvidere and Delaware River Railway |
| BDTL | Ballard Terminal Railroad |
| BDTL | Ballard Terminal Railroad Company |
| BDW | Bad Water Line |
| BDW | Bighorn Divide and Wyoming Railroad |
| BE | Baltimore and Eastern Railroad (Conrail) |
| BEAU | Beacon Intermodal Leasing |
| BECX | Beauford East Coast Railroad (FMC Corporation) |
| BECX | FMC Corporation |