| T | temperature rate |
| T&C | telemetry and control |
| T&C | terms and conditions |
| T&C | test and checkout |
| T&C | tracking and communication |
| T&CD | timing and countdown |
| T&CP | test and checkout procedure |
| T&D | transportation and docking |
| T&E | test and evaluation |
| T&F | time and frequency |
| T&M | time and material |
| T&O | test and operations |
| T&P | tracking and processing |
| T&QA | test and quality assurance |
| T+ | time after launch |
| T- | time before launch |
| T-0 | time minus zero |
| T-0 | time zero |
| T-O | takeoff |
| T/A | turnaround |
| T/B | talkback |
| T/B | thermal barrier |
| T/B | title block |
| T/C | telecommunications |
| T/C | temperature-compensating |
| T/C | termination check |
| T/C | thermal capacitor |
| T/C | thermocouple |
| T/C | thrust chamber |
| T/C | training and certification |
| T/CAP | thermal capacitor |
| T/CD | timer/command distributor |
| T/CRD | telemetry/command requirements document |
| T/D | time delay |
| T/D | touchdown |
| T/E | transporter/erector |
| T/L | talk and listen |
| T/L | trace by lot number |
| T/L | transformer load |
| T/M | trace by member number |
| T/MGS | transportable mobile ground station |
| T/O | takeover |
| T/R | tape recorder |
| T/R | transformer rectifier |
| T/R | transmit-receive |
| T/R | turnaround requirement |
| T/S | time-sharing |
| T/S | traceability by serial number |
| T/S | troubleshoot |
| T/T | terminal timing |
| T/T | timing/telemetry |
| T/TCA | thrust translation control assembly |
| T/V | thermal vacuum |
| T/W | thrust-to-weight ratio |
| TA | Teal Amber |
| TA | task analysis |
| TA | task assessment |
| TA | task assignment |
| TA | task authorization |
| TA | test announcer |
| TA | test article |
| TA | time actual |
| TA | transfer aisle |
| TA | travel authorization |
| TA | trunnion angle |
| TA | type approval |
| TAA | technical assistance agreement |
| TAB | Technical Advisory Board |
| TAB | targets and background |
| TAB | time after burst |
| TABI | tailorable advanced blanket insulation |
| TAC | Tactical Air Command |
| TAC | test and configuration |
| TAC | timing and address counter |
| TAC | total average cost |
| TAC | traceability and configuration |
| TACAN | tactical air control and navigation |
| TACAN | tactical air navigation |
| TACAN | tactical navigation |
| TACANS | tactical air control and navigation system |
| TACATA | air-launched antisatellite system |
| TACC | Tactical Air Control Center |
| TACCS | time, age, and cycle control system |
| TACO | test and checkout |
| TACO | test and checkout operations |
| TACP | training and certification plan |
| TADS | trade and analysis data system |
| TAEM | terminal area energy management |
| TAF | truss assembly fixture |
| TAG | technical air to ground |
| TAGS | technique for automated generation of systems |
| TAGS | technology for the automated generation of systems |
| TAGS | text and graphics system |
| TAGS | thermal analysis graphics system |
| TAIR | test and inspection record |
| TAIR | test assembly inspection record |
| TAL | transatlantic abort landing |
| TAL | transatlantic landing |
| TALAR | tactical approach and landing radar |
| TALO | time after lift-off |
| TAM | thermal analytical model |
| TAMS | trade and analysis management system |
| TAMS | transient amplitude monitor system |
| TAN | Tananarive, Madagascar (STDN site) |
| TAP | technical achievement plan |
| TAP | technical assistance plan |
| TAP | telemetry acceptance pattern |
| TAP | test administration plan |
| TAP | total air pressure |
| TAR | technical analysis request |
| TAR | test action requirement |
| TAR | test agency report |
| TARC | through-axis rotational control |
| TARE | telemetry automatic reduction |
| TARS | three-axis reference system |
| TAS | telemetry antenna system (subsystem) |
| TAS | test article specification |
| TAS | true airspeed |
| TASPR | Technical and Schedule Performance Report |
| TAT | total air temperature |
| TAT | turnaround time |
| TATI | total air temperature indicator |
| TAVERNS | Test and Verification Environment for Remotely Networked Systems |
| TB | talkback |
| TB | terminal base |
| TB | terminal board |
| TB | thermal barrier |
| TB | time base |
| TB | toggle buffer |
| TB | transverse boom |
| TBA | to be added |
| TBA | to be announced |
| TBC | The Boeing Company |
| TBCM | target background characterization model |
| TBD | to be determined |
| TBD | to be developed |
| TBE | Teledyne Brown Engineering |
| TBE | to be evaluated |
| TBG | gyro-to-body transformation matrix |
| TBI | body axis-to-inertial transformation matrix |
| TBI | through-bulkhead initiator |
| TBM | table buffer management |
| TBM | tactical ballistic missile |
| TBN | to be negotiated |
| TBP | to be provided |
| TBR | to be revised |
| TBS | task breakdown structure |
| TBS | to be specified |
| TBS | to be superseded |
| TBS | to be supplied |
| TBTD | thermal bus technology demonstrator |
| TC | telecommunications |
| TC | temperature compensating |
| TC | test change |
| TC | test condition |
| TC | test conductor |
| TC | thermal control |
| TC | thermocouple |
| TC | thrust chamber |
| TC | time to circular |
| TC | traceability code |
| TC | tracking camera |
| TC | transfer control |
| TC | transition control |
| TC | translation control |
| TCA | temperature control amplifier |
| TCA | thrust chamber assembly |
| TCA | time of closest approach |
| TCA | translation controller assembly |
| TCAB | temperature of cabin |
| TCATA | TRADOC combined arms test activity |
| TCB | technical coordination bulletin (MSFC) |
| TCC | Test Control Center |
| TCC | Transportation Control Center |
| TCC | test classification code |
| TCC | test conductor's console |
| TCC | thermal control coating |
| TCCM | temperature-controlled crystal microbalance |
| TCD | test completion date |
| TCD | test control document |
| TCD | timing control distributor |
| TCE | thermal canister experiment |
| TCF | tank checkout facility |
| TCFP | thrust chamber fuel purge |
| TCG | Test Control Group |
| TCG | time code generator |
| TCI | technical critical item |
| TCI | terrain clearance indicator |
| TCID | test configuration identifier |
| TCLE | thermal coefficient of linear expansion |
| TCM | target cost per mission |
| TCM | technical control management |
| TCM | technical coordination meeting |
| TCMD | transportation control and movement document |
| TCN | test change notice |
| TCN | training course number |
| TCN | transportation control number |
| TCO | taken care of |
| TCO | test and checkout |
| TCOA | translational Control A |
| TCOB | translational Control B |
| TCOP | test and checkout plan |
| TCP | task change proposal |
| TCP | task control package |
| TCP | test and checkout procedure |
| TCP | test case procedure |
| TCP | test checkout procedure |
| TCP | test control package |
| TCP | thrust chamber pressure |
| TCP | tricalcium phosphate |
| TCP/IP | transmission control protocol/internet protocol |
| TCPE | total cargo project engineer |
| TCR | test compare results |
| TCR | test constraints review |
| TCR | thermal concept review |
| TCRB | Test Change Review Board |
| TCRB | Test Criteria Review Board |
| TCRD | test and checkout requirements document |
| TCRS | training and certification records system |
| TCRSD | test and checkout requirements specification |
| TCS | technical change summary |
| TCS | temperature control system |
| TCS | test control sequence |
| TCS | test control supervisor |
| TCS | test control system |
| TCS | thermal control system (subsystem) |
| TCSC | trainer control and simulation computer |
| TCSSS | thermal control subsystem segment |
| TCT | test coordination team |
| TCTI | time compliance technical instruction |
| TCTO | time compliance technical order |
| TCTR | time compliance technical requirement |
| TCU | tape control unit |
| TCV | temperature-controlled voltage |
| TCV | thrust chamber valve |
| TD | task directive |
| TD | technical direction |
| TD | technical directive |
| TD | technology data |
| TD | technology demonstration |
| TD | terminal distributor |
| TD | time delay |
| TD | touchdown |
| TD | training division |
| TD&SA | telephone, data, and special audio |
| TDA | trunnion drive axis |
| TDAAS | Two-Dimensional Data Assessment and Applications Study |
| TDB | Tranet Doppler beacon |
| TDB | target deployment bus |
| TDB | time duration of burn |
| TDC | telemetry data center |
| TDD | task description document |
| TDDB | Thermodynamic Design Data Book |
| TDDP | trajectory design data package |
| TDF | telemetry data file |
| TDF | telemetry data format |
| TDI | time delay integration |
| TDI | time-delayed integration |
| TDIF | TOPEX Data Information Facility |
| TDM | technology development mission |
| TDM | time division multiplexer |
| TDM | time division multiplexing |
| TDMA | time division multiple access |
| TDMS | terminal data management system |
| TDP | technology demonstration plan |
| TDP | temperature and dew point |
| TDP | tracking data processor |
| TDPD | technical data program document |
| TDR | technical data report |
| TDR | technical design review |
| TDR | technical documentation report |
| TDR | test discrepancy report |
| TDRB | Tool Design Review Board |
| TDRS | telemetry downlink receiving site |
| TDRS | tracking and data relay satellite |
| TDRSS | tracking and data relay satellite system |
| TDS | technology demonstration satellite |
| TDS | test data system |
| TDSP | time-dependent signal processor |
| TDT | telemetry data tape |
| TDT | tower disconnect technician |
| TDU | time display unit |
| TDV | test data van |
| TDV | tool design variance |
| TDY | temporary duty |
| TE | test equipment |
| TE | time earliest |
| TE | time expected |
| TE | timing electronics |
| TE | trailing edge |
| TE | trans-Earth |
| TE | transmission error |
| TE | transporter erector |
| TE | transverse electric |
| TEA | torque equilibrium attitude |
| TEB | tone-encoded burst |
| TEC | test equipment center |
| TEC | trans-Earth coast |
| TED | Test Evaluation Directorate |
| TED | threat environment description |
| TED | trailing edge down |
| TEG | Technical Evaluation Group |
| TEI | trans-Earth injection |
| TEISC | test and evaluation information support capability |
| TELECON | telecommunication satellite (French-German) |
| TELESAT | Canadian payload |
| TELESAT | telecommunications satellite |
| TEM | target engine module |
| TEM | transmission electron microscope |
| TEM | transverse electromagnetic |
| TEMP | test and evaluation master plan |
| TEMPEST | Air Force security program |
| TEMS | transport environment monitoring system |
| TEOS | tetraethyl orthosilicate |
| TEP | Technical Evaluation Panel |
| TEP | test and evaluation plan |
| TER | test equipment readiness |
| TER | time estimating relationship |
| TER | travel expense report |
| TERL | test equipment readiness list |
| TEST | time-efficient sequencer of tests |
| TET | trajectory events time line |
| TETRA | terminal tracking telescope |
| TEV | target engine vehicle |
| TEXSYS | thermal control system diagnosis expert system |
| TF | test facility |
| TF | test fixture |
| TFC | time from cutoff |
| TFCS | triplex flight control subsystem |
| TFE | time from event |
| TFF | time to free fall |
| TFI | technology flight instrumentation |
| TFI | time from ignition |
| TFL | telemetry format load |
| TFL | time from launch |
| TFM | target incentive fee per mission |
| TFO | transferring from original |
| TFOV | total field of view |
| TFR | trouble and failure report |
| TFS | telemetry format selection |
| TFU | test facility utilization |
| TFU | theoretical first unit |
| TG | Talon Gold |
| TG | tail gear |
| TG | technical guidance |
| TG | test guideline |
| TGA | thermal gravimetric analysis |
| TGA | thermogravimeter analyzer |
| TGA | trace gas analyzer |
| TGE | Talon Gold Experiment |
| TGG | third-generation gyro |
| TGIR | test generation with infrared reasoning |
| TGO | time to go |
| TGOWG | Teleoperator Ground Operations Working Group |
| TGS | telemetry ground station |
| TGS | telemetry ground system |
| TGSE | telemetry ground support equipment |
| TGTV | Talon Gold target vehicle |
| THA | thermal hydraulic analyzer |
| THAP | thermal/hydraulic analyzer digital computer program |
| THC | total hydrocarbon |
| THC | translational hand control |
| THC | translational hand controller |
| THDS | time homogeneous data set |
| THP | thrust horsepower |
| TI | Information Systems (KSC) |
| TI | technical integration |
| TI | technical interchange |
| TI | temporary installation |
| TI | terminal phase initiation |
| TI | test instruction |
| TI | timing interface |
| TI | training integrator |
| TIATA | technical information and training authoring |
| TIC | Technical Information Center |
| TIC | total item change |
| TICM | test interface and control module |
| TIDDB | Thermal Interface Design Data Book |
| TIE | technology integration experiment |
| TIFDL | TOPEX interfacility data link |
| TIFS | total in-flight simulator |
| TIG | time of ignition |
| TIG | tungsten inert gas |
| TII | tooling inspection instrumentation |
| TIL | Technology Insertion Laboratory |
| TIM | technical interchange meeting |
| TIM | technical interface meeting |
| TIMM | thermally integrated micromodule |
| TIMO | temporary installation manufacturing order |
| TIO | target insertion orbit |
| TIP | Technical Integration Panel |
| TIP | target instrument payload |
| TIP | thrust inlet pressure |
| TIPEX | test in progress executive |
| TIPS | thruster instability protection system |
| TIPS | tile information processing system |
| TIR | temporary installation record |
| TIR | terminal imaging radar |
| TIR | total indicator reading |
| TIRAD | tool for infrared algorithm development |
| TIROS | television infrared observation satellite |
| TIS | test information sheet |
| TIS | test interface subsystem |
| TIWG | Technical Interface Working Group |
| TJ | tower jettison |
| TJM | tower jettison motor |
| TKI | trail kit installation |
| TL | talk-listen |
| TL | test load |
| TL | thrust level |
| TL | thrust line |
| TL | time latest |
| TL | time line |
| TL | transient load |
| TL | transmittal letter |
| TLCE | transmission line conditioning equipment |
| TLCN | test logic and constraint network |
| TLCSC | top-level computer software component |
| TLD | thermoluminescent dosimeter |
| TLF | terminal launch facility |
| TLG | tail landing gear |
| TLI | translunar injection |
| TLS | time line sheet |
| TLS | top left side |
| TLSA | torso limb suit assembly |
| TLV | target launch vehicle |
| TLV | threshold limit value |
| TLV | transporter-loader vehicle |
| TM | task master |
| TM | technical management |
| TM | technical manual |
| TM | technical memorandum |
| TM | test maintenance |
| TM | time management |
| TM | torque motor |
| TM | traffic manager |
| TM | traffic model |
| TM | transverse magnetic |
| TMA | technology mirror assembly |
| TMA | thermomechanical analyzer |
| TMB | transportation management bulletin |
| TMBU | table maintenance block update |
| TMC | test monitoring console |
| TMCC | temporary MCC |
| TMECO | time of main engine cutoff |
| TMF | training mission facility |
| TMF | transporter maintenance facility |
| TMG | thermal meteoroid garment |
| TMG | traffic management |
| TMI | test method instruction |
| TMI | transmars injection |
| TMIS | technical management information system |
| TML | total mass loss |
| TMM | thermal math model |
| TMO | test management order |
| TMO | test manufacturing order |
| TMO | tool manufacturing order |
| TMOS | two main orbiting spacecraft |
| TMP | terminal panel |
| TMP | time management processor |
| TMPV | torque motor pilot valve |
| TMR | TOPEX microwave radiometer |
| TMS | task management system |
| TMS | technical management system |
| TMS | teleoperator maneuvering system |
| TMS | time-sharing system |
| TMS | trend monitoring system |
| TMS-AIMME | The Metallurgical Society, American Institute of Mining, Metallurgy, and Engineering |
| TMU | temperature measurement unit |
| TN | technical note |
| TO | takeoff |
| TO | takeover |
| TO | task order |
| TO | technical order |
| TO | tool order |
| TOA | time of arrival |
| TOC | Tactical Operations Center |
| TOC | Test Operations Center |
| TOC | test operations change |
| TOD | time of day |
| TOD | tour of duty |
| TOF | test operations facility |
| TOI | transfer orbit insertion |
| TOM | target object map |
| TOM | task ordering management |
| TON | test operation notice |
| TOO | target of opportunity |
| TOP | technical operating procedure |
| TOP | technical operations procedure |
| TOP | test operational plan |
| TOP | transportable office protocol |
| TOPEX | Ocean Topography Experiment |
| TOPS | transfer orbit perigee stage |
| TOPS | transistorized operational phone system |
| TOR | technical operating report |
| TOR | test operating report |
| TOS | teleoperator system |
| TOS | test operating system |
| TOS | transfer orbit stage |
| TOW | tank and orbiter weight |
| TP | test point |
| TP | test port |
| TP | test procedure |
| TP | time to perigee |
| TP | training plan |
| TP | transition period |
| TP | true position |
| TP | turbopump |
| TP&C | thermal protection and control |
| TPA | test planning analysis |
| TPA | test preparation area |
| TPA | turbopump assembly |
| TPAD | trunnion pin acquisition device |
| TPC | technical performance criteria |
| TPC | telemetry preprocessor computer |
| TPCN | technical program change negotiation |
| TPCN | test plan change notice |
| TPD | terminal protection device |
| TPDS | test procedures development system |
| TPE | test project engineer |
| TPE | tracking and pointing experiment |
| TPF | terminal phase final (maneuver) |
| TPF | terminal phase finalization (braking) |
| TPF | terminal phase finish |
| TPF | transfer phase final |
| TPF | tug processing facility |
| TPI | terminal phase initiation |
| TPITS | two-phase integrated thermal system |
| TPL | transpacific landing |
| TPM | technical performance measurement |
| TPM | terminal phase maneuver |
| TPM | terminal phase midcourse |
| TPM | transfer phase midcourse |
| TPMS | technical performance measurement system |
| TPO | tank pressurizing orifice |
| TPO | test program outline |
| TPOCP | turbopump oxidizer cavity purge |
| TPP | test point PACE |
| TPR | technical progress review |
| TPR | test problem report |
| TPR | training personnel requirement |
| TPS | test preparation sheet |
| TPS | thermal protection system (subsystem) |
| TPS | training planning system |
| TPS | twisted pair shielded |
| TPSS | test preparation sheet summary |
| TPTA | transient pressure test article |
| TPTG | tuned plate, tuned grid |
| TPUN | test procedure update notice |
| TQE | timer queue element |
| TQI | total quality involvement |
| TQM | total quality management |
| TQP | total quality program |
| TR | Teal Ruby |
| TR | tape recorder |
| TR | technical report |
| TR | test request |
| TR | thrust reverser |
| TR | time to retrofire |
| TR | tool request |
| TR | transistor/receiver |
| TR | transmitter/receiver |
| TR | transportation request |
| TR/SBS | teleoperator retrieval/Skylab boost system |
| TRA | test requirements analysis |
| TRA | training requirements analysis |
| TRA | turnaround requirements analysis |
| TRAC | total record access control |
| TRACS | tool record accountability system |
| TRACS | transaction record accountability and control system tission security |
| TRAP | Transient Response Analysis Program |
| TRASYS | thermal radiation analysis system |
| TRB | Test Review Board |
| TRCP | tape recorder control panel |
| TRD | technical requirements data |
| TRD | technical requirements document |
| TRD | test requirements document |
| TRDA | three-axis rotational control, Direct A |
| TRDB | three-axis rotational control, Direct B |
| TRDDS | Teal Ruby data documentation system |
| TRDF | Teal Ruby data formatter |
| TRE | Teal Ruby Experiment |
| TRE | training equipment |
| TRE/ITU | Teal Ruby Experiment/infrared telescope unit |
| TRED | TRASYS editor |
| TREMOC | Teal Ruby Experiment Mission Operations Center |
| TREND | technical requirements engineering network data base |
| TRF | tuned radio frequency |
| TRGD | technical requirements and goals document |
| TRIC | transition radiation and ion calorimeter |
| TRIM | testing for reliability by incremented maximization |
| TRIS | test and reliability information system |
| TRL | test readiness list |
| TRMS | technical requirements management system |
| TRN | task requirements notice |
| TRNA | three-axis rotational control, Normal A |
| TRNB | three-axis rotational control, Normal B |
| TRON | time rationale organizational notation |
| TRP | Technical Review Panel |
| TRPD | test requirements and plan documentation |
| TRR | tape recorder reproducer |
| TRR | technical requirements review |
| TRR | test readiness review |
| TRR | test requirements review |
| TRRU | tape recorder reproducer unit |
| TRS | Teal Ruby spacecraft |
| TRS | teleoperator retrieval system |
| TRS | telerobotics servicer |
| TRS | test requirements sheet |
| TRS | time reference system |
| TRS | top right side |
| TRS | training record system |
| TRS | troubleshooting record sheet |
| TRS | tug rotational system |
| TRSD | test requirements and specification document |
| TRSD | test requirements specification document |
| TS | Technical Support (KSC directorate) |
| TS | target system |
| TS | tensile strength |
| TS | test site |
| TS | test stand |
| TS | test station |
| TS | time scheduled |
| TS | timing system (subsystem) |
| TS | tool steel |
| TS | tracking subsystem |
| TS&ET | test support and evaluation team |
| TS-C | tooling supplement to contract |
| TSA | test start approval |
| TSAC | tracking system analytic calibration |
| TSB | temporary stowage bag |
| TSB | twin side band |
| TSC | Technical Support Center (MSFC) |
| TSC | test setup complete |
| TSC | test support coordinator |
| TSC | tooling supplemental contract |
| TSCD | test specification control document |
| TSCM | technical survey countermeasure |
| TSCO | Test Support Coordination Office |
| TSCP | training simulator control panel |
| TSCS | test support computer system |
| TSD | Technical Services Division |
| TSD | test start date |
| TSE | team supportability element |
| TSE | test support equipment |
| TSE | transportation support equipment |
| TSG | threat scenario generator |
| TSGP | test sequence generator program |
| TSL | test support language |
| TSLD | troubleshooting logic diagram |
| TSM | tail service mast |
| TSM | test support methodology |
| TSM | trade study management |
| TSMD | time-stress measurement device |
| TSMT | technical support management team |
| TSO | time since overhaul |
| TSO | time-sharing operations |
| TSO | time-sharing option |
| TSP | test software program |
| TSP | trajectory shaping program |
| TSP | trajectory synthesis program |
| TSP | twisted shielded pair |
| TSR | technical status review |
| TSR | test schedule report |
| TSR | test status report |
| TSR | trade study report |
| TSRA | total system requirements analysis |
| TSS | telemetry simulation/system |
| TSS | terminal security system |
| TSS | terminal support system |
| TSS | test software support |
| TSS | test support system |
| TSS | tethered satellite system |
| TSS | time-sharing system |
| TSS | tug structural support |
| TSSU | test signal switching unit |
| TST | time-sharing terminal |
| TSU | time standard unit |
| TSW | test software |
| TSW | test switch |
| TT | terminal timing |
| TT | thrust termination |
| TT | total time |
| TT&C | telemetry, tracking, and communications |
| TT&C | tracking, telemetry, and command |
| TT&C | tracking, telemetry, and control |
| TT&E | test, teardown, and evaluation |
| TTA | thermomechanical test area |
| TTA | time to apogee |
| TTB | technology test bed |
| TTC | telemetry, tracking, and command |
| TTC | tunnel thermal control |
| TTCA | thrust translation controller assembly |
| TTCV | tracking, telemetry, command, and voice |
| TTE | test teardown and evaluation |
| TTE | time to event |
| TTEL | tool and test equipment list |
| TTESP | test time event sequencer plan |
| TTF | transition task force |
| TTG | time to go |
| TTG | transition task group |
| TTL | transistor-transistor logic |
| TTOF | thermally tunable optical filter |
| TTP | time to perigee |
| TTT | through the thickness |
| TTU | timing terminal unit |
| TTVC | test termination and verification contractor |
| TTY | DACP test set |
| TTY | teletype |
| TU | technical utilization |
| TU | technology utilization |
| TU | transport unit |
| TUFI | toughened unipiece fibrous insulation |
| TV | target vehicle |
| TV | television |
| TV | thermal vacuum |
| TV | thrust vector |
| TV | transport vehicle |
| TV | transporter vehicle |
| TVA | temporary variance authority |
| TVA | thrust vector alignment |
| TVAR | test variance |
| TVC | thermal vacuum chamber |
| TVC | thrust vector control |
| TVCD | thrust vector control driver |
| TVCS | thrust vector control system |
| TVD | total variation diminishing |
| TVE | technology validation experiment |
| TVE | test evaluation experiment |
| TVEXPIS | TV experiment interconnecting station |
| TVN | test verification network |
| TVP | test verification program |
| TVS | toxic vapor suit |
| TVSA | thrust vector servoamplifier |
| TVSSIS | TV subsystem interconnecting station |
| TVT | thermal vacuum test |
| TVTA | thermal vacuum test article |
| TW | tactical warning |
| TW | tail wind |
| TW | threat warning |
| TW | thumb wheel |
| TW | time word |
| TW | traveling wave |
| TW/AA | tactical warning/attack assessment |
| TWD | tail wags dog |
| TWDS | twisted double shielded |
| TWG | transition working group |
| TWL | threat wavelength |
| TWT | transonic wind tunnel |
| TWT | traveling-wave tube |
| TWTA | traveling-wave tube amplifier |
| TWU | Transportation Workers Union of America |
| TWX | teletype wire transmission |
| TX | transmit channel |