| Abbreviation | Definition |
|---|---|
| BAYL | Bay Line Railroad |
| BAYL | Bay Line Railroad L.L.C. |
| BAYU | Mobay Chemical Corp (Chemion Logistik) |
| BAYU | Mobay Chemical Corporation |
| BAYX | Bayer Corporation |
| BAZX | Bay Chemical |
| BB | Buckingham Branch Railroad |
| BB | Buckingham Branch Railroad Company |
| BBCX | ABB Power Generation Incorporated |
| BBCX | BBC Brown Boveri (ABB Power Generation) |
| BBRX | Bombardier Inc. |
| BBRX | Bombardier Incorporated Transportation Equipment Group |
| BBSZ | Barbar Steamship Lines |
| BBSZ | Barbar Steamship Lines Incorporated |
| BBTU | Bress Bulk International Bulk Transport and Consulting |
| BCAX | Blue Circle |
| BCAX | Blue Circle Incorporated |
| BCCX | Border Chemical |
| BCCX | Border Chemical Company Limited |
| BCDX | Borden Chemical |