| Abbreviation | Definition |
|---|---|
| FCCX | Foxley Cattle Company |
| FCDN | Ferrocarril de Nacozari |
| FCEN | Florida Central Railroad |
| FCEN | Florida Central Railroad Company Incorporated |
| FCEX | CENEX Incorporated |
| FCEX | Farmers Union Central Exchange |
| FCHZ | Flexi-Van Leasing |
| FCIN | Frankfort and Cincinnati Railroad |
| FCM | Ferrocarril Mexicano |
| FCM | Ferrocarriles Nacionales de Mexico |
| FCOX | FLO CO2 |
| FCP | Ferrocaril Central Pacifico |
| FCP | Ferrocarril del Pacifico |
| FCP | Ferrocarriles Nacionales de Mexico |
| FCPZ | National Railways of Mexico (Ferrocarriles Nacionales) |
| FCRD | First Coast Railroad |
| FCRK | Falls Creek Railroad |
| FCRP | Florida Coalition of Rail Passengers |
| FCSX | Florida Crushed Stone |
| FCSX | Florida Crushed Stone Company |