| Acronym | Meaning |
 | AARP | American Association Of Retired People |
| MOS | Marine Observation Satellite |
| AORD | Astronaut Operations Requirements Document |
| MAR | Modernization And Associated Restructing |
| AFOS | Automation Of Field Operations And Services |
| FREON | DuPont Trade Name |
| IMAGES | Intermediate Model For The Annual And Global Evolution Of Interactive Systems |
| AES | Auger Electron Spectroscopy |
| AWS | Aviation Weather Service |
| API | American Petroleum Institute |
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