| Acronym | Meaning |
 | CARB | California Air Resources Board |
| EDRS | European Data Relay Satellite |
| XUV | Extreme Ultraviolet |
| MMD | Mass Median Diameter |
| ET | Evapotranspiration |
| ORD | Office Of Research And Development |
| AFW | Auxiliary Feedwater |
| AIRAPT | International Association For Research On High Pressure Science & Technology |
| SMG | Scientific And Management Group |
| AID | Agency For International Development |
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