| Abbreviation | Definition |
|---|---|
| CBRL | Coos Bay Rail Line |
| CBRM | Chillicothe-Brunswick Rail Maintenance |
| CBRM | Chillicothe-Brunswick Rail Maintenance Authority |
| CBRW | Columbia Basin Railroad |
| CBRW | Columbia Basin Railroad Company |
| CBRX | Charles Barthoid |
| CBRY | Copper Basin Railway |
| CBRY | Copper Basin Railway Incorporated |
| CBS | Can't Be Stopped |
| CBYN | Crosbyton Railway |
| CBYN | Crosbyton Railway Company Incorporated |
| CC | Chicago Central and Pacific Railroad |
| CC | Chicago Central and Pacific Railroad Company |
| CCAU | Cement Cartage Limited |
| CCAX | Corona Coal (FDJ Leasing) |
| CCAX | F D J Leasing |
| CCBX | Central City & Blackhawk Railroad (Union Carbide Corporation) |
| CCBX | Union Carbide Corporation |
| CCC&ST/L | Cleveland, Columbus, Cincinnati Saint Louis Railline |
| CCC&ST/L | Cleveland, Columbus, Cincinnati & Saint Louis Railline |