| T-LAPS | Terminal LAPS | - | Business and Finance |
| T.P. | Tropical Platform | - | Business and Finance |
| T42 | Triangular 42 | - | Business and Finance |
| TA | Technology Applications | - | Business and Finance |
| TA# | Taylor Number | - | Business and Finance |
| TACAN | Tactical Air Navigation System | - | Business and Finance |
| TAGS | Text And Animation Graphics Server | - | Business and Finance |
| TAMEX | Taiwan Mesoscale Experiment | - | Business and Finance |
| TAO | Tropical Atmosphere Ocean | - | Business and Finance |
| TAO | Thermal Array In The Ocean | - | Business and Finance |
| TAP | Transportation Alternatives Program | - | Business and Finance |
| TAP | Diffusion Transport Models | - | Business and Finance |
| TAP BL | Non-reactive Gases | - | Business and Finance |
| TAP IR | Reactive Gases | - | Business and Finance |
| TAP LS | Liquid And Solid Particles | - | Business and Finance |
| TAR | Third Assessment Report | - | Business and Finance |
| TAS | True Air Speed | - | Business and Finance |
| TASI | Time-assingment Speech Interpolation | - | Business and Finance |
| TASU | Time-alternating Space-uncentered | - | Business and Finance |
| TB | Terabytes | - | Business and Finance |
| TB | Terabits | - | Business and Finance |
| TBD | To Be Determined | - | Business and Finance |
| TBM | Terabit Memory System | - | Business and Finance |
| TBO | Tropospheric Biennial Oscillation | - | Business and Finance |
| TCAS-II | Traffic Alert And Collision Avoidance System | - | Business and Finance |
| TCCR | Technical Committee For Computing Resources | - | Business and Finance |
| TCI | Tropical Cyclone Initiation | - | Business and Finance |
| TCIPO | TOGA/COARE International Project Office | - | Business and Finance |
| TCMRS | Tropical Climate Monitoring And Research Station | - | Business and Finance |
| TCP | Technology Commercialization Program | - | Business and Finance |
| TCP | Transport Control Protocol | - | Business and Finance |
| TCP/IP | Transmission Control Program/Internet Protocol | - | Business and Finance |
| TCS | Thermal Control System | - | Business and Finance |
| TCSM | Tropospheric Chemistry Systems Models | - | Business and Finance |
| TCZ | Tropical Cloud Zone | - | Business and Finance |
| TCZ | Tropical Convergence Zone | - | Business and Finance |
| TD | Thermal Dissociation | - | Business and Finance |
| TDCIMS | Thermal Desorption Chemical Ionization Mass Spectrometer | - | Business and Finance |
| TDF | Technology Development Facility | - | Business and Finance |
| TDL | Techniques Development Lab | - | Business and Finance |
| TDL | Tunable Diode Laser | - | Business and Finance |
| TDLAS | Tunable Diode Laser Absorption Spectroscopy | - | Business and Finance |
| TDM | Three-dimensional Time-varying Mesoscale Model | - | Business and Finance |
| TDM | Time Division Multiplex | - | Business and Finance |
| TDMC | TAMEX Data Management Center | - | Business and Finance |
| TDR | Tracking And Data Relay | - | Business and Finance |
| TDWR | Terminal Doppler Weather Radar | - | Business and Finance |
| TEA | Transversely Excited Atmospheric (pressure) | - | Business and Finance |
| TEB | Tropical Experiment Board | - | Business and Finance |
| TEC | Tropical Experiment Council | - | Business and Finance |
| TECAMS | Technical Conference On Automated Meteorological Systems | - | Business and Finance |
| TECC | Tropospheric Effects Of Cloud Chemistry Program | - | Business and Finance |
| TECOM | Test And Evaluation Command | - | Business and Finance |
| TELNET | TCP/IP Network | - | Business and Finance |
| TERAFLOPS | Trillions Of Arithmetic Operations Per Second | - | Business and Finance |
| TES | Transequatorial Scatter | - | Business and Finance |
| TES | Tropospheric Emission Spectrometer | - | Business and Finance |
| TEXEX | Texas Frontal Experiment | - | Business and Finance |
| TEXMEX | Tropical Experiment Over Mexico | - | Business and Finance |
| TGB | Trace Gas Biogeochemistry Section | - | Business and Finance |
| TGCM | Thermospheric General Circulation Model | - | Business and Finance |
| TGS | Text And Graphics System | - | Business and Finance |
| THC | Total Hydrocarbons | - | Business and Finance |
| THEMIS | N/A | - | Business and Finance |
| THERMEX | Thermal Wave Experiment | - | Business and Finance |
| THIR | Temperature And Humidity Infrared Radiometer | - | Business and Finance |
| THORPEX | The Observing System Research And Predictability Experiment | - | Business and Finance |
| THREDDS | Thematic Real-time Environmental Distributed Data Services | - | Business and Finance |
| TIAA | Teachers Insurance And Annuity Association | - | Business and Finance |
| TIBEX | Tidewater Bermuda Experiment | - | Business and Finance |
| TID | Traveling Ionospheric Disturbance | - | Business and Finance |
| TIDI | TIMED Doppler Interferometer | - | Business and Finance |
| TIE | The Institute Of Ecology | - | Business and Finance |
| TIE-GCM | Thermosphere/Ionosphere/Electrodynamics General Circulation Model | - | Business and Finance |
| TIFF | Tag Image File Format | - | Business and Finance |
| TIGCM | Thermosphere-ionosphere General Circulation Model | - | Business and Finance |
| TIME | Thermosphere-ionosphere-mesosphere-electrodynamics | - | Business and Finance |
| TIME-GCM | Thermosphere-ionosphere-mesosphere-electrodynamic General Circulation Model | - | Business and Finance |
| TIME-GCM | Thermosphere-Ionosphere-Mesosphere-Electrodynamic General Circulation Model | - | Business and Finance |
| TIMED | Thermosphere-Ionosphere-Mesosphere Energetics & Dynamics | - | Business and Finance |
| TIMS | Thermal Infrared Multispectral Scanner | - | Business and Finance |
| TING | Thermosphere-Ionosphere Nested Grid Model | - | Business and Finance |
| TIP | Terminal Interface Processor | - | Business and Finance |
| TIP | TIROS Information Processor | - | Business and Finance |
| TIPIC | Transformation D'Idees En Produits Industrialisables Et Commercialisables | - | Business and Finance |
| TIPMEX | Tibetan Plateau Meteorological Experiment | - | Business and Finance |
| TIPMEX | Tibetan Plateau Meteorological Experiment | - | Business and Finance |
| TIROS | Television And Infrared Operational Satellite | - | Business and Finance |
| TIROS | Thermal Infrared Observational Satellite | - | Business and Finance |
| TIROS I | Television Infrared Observation Satellite | - | Business and Finance |
| TIWEX | Tropical Institute (or Instability) Wave Experiment | - | Business and Finance |
| TKE | Turbulent Kinetic Energy | - | Business and Finance |
| TKW | Turbulence Kinematic Energy | - | Business and Finance |
| TLLMES | The Institute For Integrative And Multidisciplinary Earth Studies | - | Business and Finance |
| TLS | Tunable Laser Spectroscopy | - | Business and Finance |
| TM | Thermatic Mapper | - | Business and Finance |
| TM | Team Member | - | Business and Finance |
| TMD | Thailand Meteorological Department | - | Business and Finance |
| TMS | Thermatic Mapper Simulator | - | Business and Finance |
| TOA | Top Of The Atmosphere | - | Business and Finance |
