| Acronym | Meaning |
 | PPI | Plan-postition Indicator |
| D/RADEX | Digital Radar Experiment |
| ECR | Engineering Change Request |
| PSC | Polar Stratospheric Cloud |
| BGCWG | Biogeochemistry Working Group |
| SAV | State-of-the-atmosphere Variable |
| DIB | Disabilities Issues Board |
| NEIC | National Earthquake Information Center |
| ALPTRAC | Part Of EUROTRAC |
| VWS | Vertical Wind Shear |
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