| Acronym | Meaning |
| UNICOS | Unix Cray Operating System |
| MPR | Advanced Microwave Precipitation Radiometer |
| ILEC | International Lake Environment Committee |
| FSSP | Forward Scattering Spectometer Probe |
| ENACEOS | Energetic Neutral Atom Camera For EOS |
| DSI (+/OR MOD) | Defense Security Installation |
| ITS | Instrument Technical Specification |
| ETL | Energy Technology Programs |
| SLR | Satellite Laser Ranging |
| SPTVAR | Special Purpose Test Vehicle For Atmospheric Research |