| Acronym | Meaning |
 | TCR | Test Conductor |
| TCR | Test Constraints Review |
| TCR | Thermal Concept Review |
| TCRSD | Test And Checkout Requirements Spec. Documentation |
| TCS | Technical Change Summary |
| TCS | Technical Concurrence Sheets |
| TCS | Test Control Supervisor |
| TCS | Test Control System |
| TCS | Thermal Control System (Subsystem) |
| TCSSS | Thermal Control Subsystem Segment |
| TCTI | Time Compliance Technical Instruction |
| TCTO | Time Compliance Technical Order |
| TCU | TaPe Control Unit |
| TCV | Temperature Control Voltage |
| TCV | Thrust Chamber Valve |
| TD | Technical Directive |
| TD | Terminal Distributor |
| TD | Test Director (NASA) |
| TD | Time Delay |
| TD | Touch Down |
| TD&SA | Telephone |
| TDD | Task Description Document |
| TDM | Time-Division Multiplexing (Multiplexer) |
| TDP | Temperature And Dewpoint |
| TDP | Tracking Data Processor |
| TDR | Technical Design Review |
| TDR | Technical Documentation Report |
| TDR | Test Discrepancy Report |
| TDRR | Test Data Recording And Retrieval |
| TDRS | Telemetry Downlist Receiving Site |
| TDRS | Tracking And Data Relay Satellite |
| TDRS | Tracking And Data Relay Satellite |
| TDRSS | Tracking And Data Relay Satellite System |
| TDRSS | Tracking And Data Relay Satellite System |
| TDS | Technology Demonstration Satellite |
| TDS | Test Data System |
| TDU | Time Display Unit |
| TDV | Test Data Van |
| TDY | Temporary Duty |
| TE | Test Equipment |
| TE | Time Earliest/Expected |
| TE | Timing Electronics |
| TE | Trailing Edge |
| TEC | Test Equipment Center |
| TECH | Technical |
| TECH | Technician |
| TED | Trailing Edge Down |
| TELCOM | Telecommunications |
| TELESAT | TELESAT (Canadian Payload |
| TEMP | Temperature |
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