| Abbreviation | Definition |
|---|---|
| FVRR | Fredonia Valley Railroad |
| FVW | Fox Valley and Western |
| FVW | Fox Valley and Western Limited |
| FWAZ | Flexi-Van Leasing |
| FWCR | Florida West Coast Railroad |
| FWCR | Florida West Coast Railroad Incorporated |
| FWD | Burlington Northern and Santa Fe Railway Company |
| FWD | Fort Worth and Denver Railway (BNSF Railway) |
| FWDB | Fort Worth and Dallas Belt Railroad |
| FWDR | Fort Worth and Dallas Railroad |
| FWDR | Fort Worth and Dallas Railroad Company |
| FWIU | Trans Ocean |
| FWIU | Trans Ocean Limited |
| FWLX | Foster Wheeler Limited |
| FWLX | Foster Wheeler Ltd. |
| FWRY | Fillmore and Western Railway |
| FWTZ | Flexi-Van Leasing |
| FWU | Fort Wayne Union |
| FWWR | Fort Worth and Western Railroad |
| FWWR | Fort Worth and Western Railroad Company |