| Acronym | Meaning |
| TDMP | Training Device Maintenance Plan |
| TDP | Technical Development Plan |
| TDP | Turbine Exhaust Pressure |
| TDR | Time Domaine Reflectometer |
| TDSP | Technical Data Support Package |
| TDY | Temporary Duty |
| TE | Training Equipment (device) |
| TEC | Temporary Engineering Change |
| TEC | Type Equipment Code |
| TECCB | Training Equipment Change Control Board |
| TECD | Training Equipment Change Directive |
| TECP | Trainer Engineering Change Proposal |
| TECR | Training Equipment Change Request (form 4720) |
| TEECP | Training Equipment Engineering Change Proposal |
| TEES | Transportable Electronic Exploit System |
| TEMP | Test And Evaluation Master Plan |
| TEMPEST | Interference Control Technology For Radiated Or Conducted |
| TEOP | Trainer Development Management Plan |
| TEPP | Test And Evaluation Program Plan |
| TERF | Terrain Flight |
| TESS | Tactical Environment Support System |
| TESSDL | Training Equipment Sub-system Data List |
| TEWDS | Tactical Electronic Warfare Deception System |
| TF | Terrain Following |
| TF/GM | Terrain Following/ground Mapping |
| TF/TA | Terrain Following/terrain Avoidance |
| TFCC | Navy Command And Control System Afloat |
| TFR | Terrain Following Radar |
| TFU | Turret Flir Unit |
| TGT | Target |
| THDG | True Heading |
| THOTS | Technical Hands-on Training System |
| THR | Threshold |
| THR | Thrust |
| TIC | Technical Information Center |
| TID | Task Identification Code |
| TILT | Tiltaxis |
| TIM | Technical Interchange Meeting |
| TIMM | Task Identification Management Matrix |
| TIP | Terminal Interface Program |
| TIP | Trainer Improvement Program |
| TIS | Training Integration System |
| TIXS | Tactical Information Exchange System (otcixs) |
| TLA | Training Level Assignment |
| TLAM | Tomahawk Land Attack Missile |
| TLCSC | Top-level Computer Software Component |
| TLT | Tilt |
| TLWR | Top Level (warfare) Requirements |
| TM | Technical Manual |
| TMC | Technical Manual Code |