| Acronym | Meaning |
 | NSO | National Solar Observatory |
| QNH | Quasi-nonhydrostatic Model |
| SEM | System Element Management |
| UARS | Upper Atmosphere Research Satellite |
| FAN | File Array Notation |
| MEGAN | Model Of The Exchange Of Gases Between The Atmosphere And Nature |
| FBI | Federal Bureau Of Investigation |
| NIRNS | National Institute For Research In Nuclear Science |
| TGB | Trace Gas Biogeochemistry Section |
| GEWEX | Continental-Scale Project |
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