| Abbreviation | Definition |
|---|---|
| TCID | Test Control Identifier |
| TCIR | Total Case Incident Rate |
| TCM | Trajectory Correction Maneuver |
| TCMS | Test, Control, and Monitoring System |
| TCN | Test Change Notice |
| TCO | Taken Care Of |
| TCO | Test and CheckOut |
| TCOP | Test CheckOut Plan |
| TCOPS | Trajectory Computation and Orbit Products System |
| TCP | Task Control Packet |
| TCP | Test Checkout Procedure |
| TCP | Test Control Package |
| TCP | Thrust Chamber Pressure |
| TCR | Test Compare Results |
| TCR | Test ConductoR |
| TCR | Test Constraints Review |
| TCR | Thermal Concept Review |
| TCRSD | Test and Checkout Requirements Specification Document |
| TCS | Technical Change Summary |
| TCS | Technical Concurrence Sheet |