| Acronym | Meaning |
 | GSOS | GPS Surface Observing System |
| LOS | Loss Of Signal |
| CDW | Critical Design Walk-through |
| IEIS | Integrated Earth Information Server |
| MRIS | Media Relations & Information Services |
| WITI | Weather Information Technologie |
| FTFC | Fourier Transform Flow Cytometer |
| PCRGA | Precipitation Chemistry |
| NSO | National Solar Observatory |
| SMI | Solar Magnetism Initiative |
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