| Acronym | Meaning |
 | APD | Areal Power Density |
| ELLWAS | Enhanced Low-Level Windshear Alert System |
| RAWS | Remote Automatic Weather Station |
| NTISS | National Telecommunications And Information Systems Security |
| AMU | Atomic Mass Unit |
| ISR | Individual Schedule Request |
| INS | Inertial Navigation System |
| NSO | National Solar Observatory |
| MIST | Microburst And Severe Thunderstorm Experiment |
| NGI | Next Generation Internet |
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