| Abbreviation | Definition |
|---|---|
| CTIZ | CTI-Container Transport International |
| CTIZ | CTI-Container Transport International Incorporated |
| CTKU | Container Tank Services |
| CTKU | Container Tank Services Limited |
| CTLX | Canadian Petroleum Tank Line (Endasa de CV) |
| CTLX | Endasa S. A. de C. V. |
| CTML | Cairo Terminal Railroad |
| CTML | Cairo Terminal Railroad Company |
| CTN | Canton Railroad |
| CTN | Canton Railroad Company |
| CTNX | Continental Carbon |
| CTNX | Continental Carbon Company |
| CTOU | Chem-Rail Logistics |
| CTPX | Certain Teed Corporation (Courtesy Corporation) |
| CTPX | Courtesy Corporation |
| CTR | Central Territory Railroad Tariff Bureau |
| CTR | Clinton Terminal Railroad (Carlton Trail Railway) |
| CTR | Clinton Terminal Railroad Company |
| CTRC | California Trolley and Railroad Corporation |
| CTRL | Channel Tunnel Rail Link |