| Abbreviation | Definition |
|---|---|
| CTC | Centralized Train Control |
| CTC | Commuter Train Connection |
| CTCU | Container Trading |
| CTCU | Container Trading Company |
| CTCX | CIT Group |
| CTCX | Endasa S. A. De C. V. |
| CTE | Cen-Tex Rail Link |
| CTE | Cen-Tex Rail Link Limited |
| CTER | Indiana and Ohio Rail System |
| CTEU | Spanish Lines |
| CTEX | Canterra Energy (PLM International) |
| CTEX | PLM International Incorporated |
| CTGZ | Combined Transport Group |
| CTGZ | Combined Transport Group Incorporated |
| CTHU | Chemical Transfer Co. |
| CTIE | Kansas City Southern Railway |
| CTIE | Kansas City Southern Railway Company |
| CTIU | CTI-Container Transport International |
| CTIU | CTI-Container Transport International Incorporated |
| CTIX | Southeastern Industrial Enterprises |