| Abbreviation | Definition |
|---|---|
| SPC | Storm Prediction Center |
| SPCC | Spill Prevention Countermeasures and Control |
| SPCZ | South Pacific Convergence Zone |
| SPECTRE | Spectral Radiation Experiment |
| SPEM | Semispectral Primitive Equation Model |
| SPG | Submersible Pressure Gauge |
| SPHL | Self Propelled Hyperbaric Lifeboat |
| SPM | Suspended Particulate Matter |
| SPMW | Subpolar Mode Water |
| SPN | Shared Processing Network |
| SPOC | Sediments Past Oceans And Climate |
| SPOC | Sediments, Past Oceans, and Climate |
| SPOT | Earth Observation Satellite |
| SPOT | Satellite Positioning and Tracking |
| SPREP | South Pacific Regional Environment Program |
| SPRI | Scott Polar Research Institute |
| SPU | Signal Processing Unit |
| SPURV | Self- Propelled Underwater Research Vehicle |
| SPWT | SSM/I Land Products Working Team |
| SPZ | Stream Protection Zone |