| Abbreviation | Definition |
|---|---|
| TCPX | Transport Capital Rail Partners |
| TCPZ | TAL International |
| TCPZ | Transamerica Leasing Incorporated |
| TCQU | Transport Canada |
| TCQX | Trinity Rail Management |
| TCRY | Tri-City Railroad |
| TCSX | Tank Car Services |
| TCSZ | Triple Crown Service |
| TCSZ | Triple Crown Services Company |
| TCT | Texas City Terminal Railway |
| TCT | Texas City Terminal Railway Company |
| TCTX | Tube City |
| TCTX | Tube City Incorporated |
| TCWR | Twin Cities and Western Railroad |
| TCX | General American Marks Company |
| TCX | General American Transportation Corporation (GATX) |
| TCXU | General American Transportation Corporation (GATX) |
| TCXU | Tcx S A R L |
| TCZU | Triple Crown Services |
| TCZU | Triple Crown Services Company |