| Abbreviation | Definition |
|---|---|
| CFNR | California Northern Railroad |
| CFNR | California Northern Railroad Company |
| CFO | Ottawa Central Railway |
| CFPX | Central Farm Products Co. (GE Railcar Services Corporation) |
| CFQC | Quebec Central Railway |
| CFR | Caile Ferate Romane |
| CFRC | Central Florida Rail Corridor |
| CFRR | Chemin de fer Rivière Romaine |
| CFRU | Cardinal Freight Carriers |
| CFSX | C and T Refinery |
| CFSX | C and T Refinery Incorporated |
| CFTX | Canadian Fertilizers |
| CFTX | Canadian Fertilizers Limited |
| CFWR | Caney Fork and Western Railroad |
| CFWR | Caney Fork and Western Railway |
| CG | Central of Georgia Railway (Norfolk Southern Railway) |
| CG | Norfolk Southern Railway Company |
| CGA | Central of Georgia Railway (Norfolk Southern Railway) |
| CGAX | Cargill (C.G.D. Division) |
| CGAX | Cargill Incorporated C. G. D. Division |