| Acronym | Meaning |
 | SEO | Special Engineering Order |
| LIN | Liquid Nitrogen |
| FSU | Freon Servicing Unit |
| EVM | Earth Viewing Module |
| FTA | Flight Test Article |
| STC | Standard Test Configuration |
| RSO | Radiological Safety Office |
| GEOSEPS | Geosynchronous Solar Electric Propulsion Stage |
| MLP | Mobile Launch (Launcher) Platform |
| PSCL | Propellant Systems Cleaning Laboratory |
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