| Abbreviation | Definition |
|---|---|
| TMAP | Thermal Modeling and Analysis Program |
| TMO | Table Mountain Observatory |
| TMRP | Tropical Meteorology Research Programme |
| TMSC | The Marine Science Consortium |
| TMZ | Turbidity Maximum Zone |
| TNW | Tundra NorthWest |
| TOA | Terre Ocean Atmosphere |
| TOAN | Tropical Ocean- Atmosphere Newsletter |
| TOBI | Towed Ocean Bottom Instrument |
| TOCS | Tropical Ocean Climate Study |
| TOGA | Tropical Ocean and Global Atmosphere |
| TOMS | Total Ozone Mapping Spectrophotometer |
| TOP | The Ocean Project |
| TOPEX | Ocean Topography Experiment |
| TOPEX | TOPography EXperiment of the ocean |
| TOPEX | Typhoon Operational Experiment |
| TOPEXPOSEIDON | Altimetry Research in Ocean Circulation |
| TOPEXPOSEIDON | TOPography EXperiment of the ocean, Altimetry Research in Ocean Circulation portion |
| TOPS | Total Ocean Profiling System |
| TOS | TIROS (Television Infra-Red Observation Satellite) Operational System |