| Abbreviation | Definition |
|---|---|
| BEEM | Beech Mountain Railroad |
| BEEM | Beech Mountain Railroad Corporation |
| BEKR | Berks Rail Corporation |
| BELX | Bell Processing |
| BEMRC | Boeing Employee Model Railroaders Club |
| BEMRC | Boeing Employees Model Railroad Club |
| BENX | Bennett Lumber Products |
| BENX | Investors Property Service |
| BEPX | Belcher Oil (Coastal States Energy) |
| BERU | Berg Manufacturing |
| BFC | Bellefonte Central Railroad |
| BFCF | Bremerton Freight Car Ferry |
| BFCX | Berwick Freight Car |
| BFCX | Berwick Freight Car Company |
| BFFX | Berwick Forge and Fabrication Division Whittaker Corporation |
| BFGX | B. F. Goodrich (Chemical Group) |
| BFGX | GEON Company |
| BFHU | Bailee Freight Services |
| BFHU | Bailee Freight Services Limited |
| BFIX | Bethlehem Steel Corporation |