| Abbreviation | Definition |
|---|---|
| CSWX | Central and South West Services |
| CSWX | Central and South West Services Incorporated |
| CSX | Central Transportation |
| CSX | Chesapeake System Express |
| CSX | Chessie Seaboard X |
| CSXE | CSX Transportation End Of Train Devices |
| CSXE | CSX Transportation Incorporated |
| CSXT | CSX Transportation |
| CSXT | CSX Transportation Incorporated |
| CSXU | CSX Transportation |
| CSXU | CSX Transportation Incorporated |
| CSXZ | CSX Transportation |
| CSXZ | CSX Transportation Incorporated |
| CSYT | Chrysler Transport |
| CSYX | Central Soya |
| CSYX | Central Soya Company Incorporated |
| CT | Centipede Tender |
| CT | City of Columbia - Columbia Terminal |
| CT | Columbia Terminal |
| CTC | Centralized Traffic Control |