| Abbreviation | Definition |
|---|---|
| TCI | Transportation and Climate Initiative |
| TCI | Transportation Capital Improvements |
| TCI | Transportation Consultants Inc |
| TCIAA | Turks and Caicos Islands Airports Authority |
| TCIC | Technical Committee On Industrial Classification |
| TCIP | Transit Communications Interface Profiles |
| TCL | Tung Chung Line |
| T-CLOCS | Tires, Controls, Lights, Oil, Chassis and Sidestand (motorcycles) |
| TCLT | Tentative Calculated Landing Time |
| TCM | Transportation Control Measure |
| TCMB | Taxi Centrale Midden Brabant |
| TCMD | Transportation Control Movement Document |
| TCMS | Train Control and Monitoring System |
| TCMS | Transportation Compliance Management Services |
| TCN | Transportation Control Number |
| TCON | Trailer Container |
| TCON | Transportation Constructor |
| TCP | Transportation Charter Party |
| TCP | Transportation Charter Permit |
| TCP | Transportation Control Plan |