| Acronym | Meaning |
 | TEMP | Test And Evaluation Master Plan |
| TEMS | Transport Environment Monitoring System |
| TEOS | Tetraethyl Orthosilicate |
| TEP | Technical Evaluation Panel |
| TEP | Test Evaluation Plan |
| TER | Test Equipment Readiness |
| TER | Time Estimating Relationship |
| TERL | Test Engineer Readiness List |
| TERL | Test Equipment Readiness List |
| TERM | Terminate |
| TESH | Technical Shop |
| TET | Test Evaluation Team |
| TF | Test Facility |
| TF | Test Fixture |
| TFC | Time From Cutoff |
| TFCS | Triplex Flight Control System (Subsystem) |
| TFE | Time From Event |
| TFF | Time To Free Fall |
| TFI | Time From Ignition |
| TFL | Telemetry Format Load |
| TFL | Time From Launch |
| TFOV | Total Field Of View |
| TFR | Trouble And Failure Report |
| TFS | Telemetry Format Selection |
| TFU | Test Facility Utilization |
| TG | Ground Systems |
| TG | Ground Systems (KSC Directorate) |
| TGA | Thermal Gravimetric Analysis |
| TGA | Trace Gas Analyzer |
| TGO | Time To Go |
| TGOWG | Teleoperator Ground Operations Working Group |
| TGS | Rate Gyro Assembly |
| TGS | Telemetry Ground Station |
| TGS | Telemetry Ground System |
| TGSE | Telemetry Ground Support Equipment |
| TGT | Target |
| THC | Translation Hand Controller |
| THC | Translational Hand Controller |
| THDS | Time Homogeneous DataSet |
| THEO | Theoretical |
| THERM | Thermal |
| THOLD | Threshold |
| THOUS | Thousarid |
| THP | Thrust Horsepower |
| THROT | Throttle |
| TI | Information Systems (KSC Directorate) |
| TI | Technical Integration |
| TI | Training Integrator (Integration) |
| TIC | Technical Information Center |
| TIC | Total Item Change |
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