| Abbreviation | Definition |
|---|---|
| SECTIONS | Energetically Active Zones of the Ocean and Climate Variability |
| SEER | Sustainable Ecological Earth Regeneration |
| SEFC | Southeast Fisheries Center |
| SEFCAR | Southeast Florida and Caribbean Recruitment |
| SEI | Stockholm Environment Institute |
| SELDADS | SEL Data Acquisition and Display System |
| SELDADS | Solar Energy Laboratory Data Acquisition and Display System |
| SELRAS | SEL Research and Analysis System |
| SELRAS | Solar Energy Laboratory Research and Analysis System |
| SEM | Scanning Electron Microscope |
| SEM | Space Environment Monitor |
| SEMA | SouthEast/Middle Atlantic |
| SEON | Solar Electro- Optical Network |
| SEOS | Synchronous Earth Observatory Satellite |
| SEP | Safety and Environment Protection System |
| SEPESCA | Secretariat of Fisheries |
| SEQUAL | Seasonal Equatorial Atlantic Experiment |
| SERDP | Strategic Environmental Research and Development Program |
| SERF | Solar Electromagnetic Radiation Flux |
| SES | Senior Executive Service |