| Acronym | Meaning |
 | LDEF | Long Duration Exposure Facility |
| HRSC | High Resolution Stereo Camera |
| DLR | Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt |
| RCS | Reaction Control System / Revision Control System |
| NSI | NASA Science Internet / NASA Standard Initiator / National Environmental Satellite Data And Information Service |
| EOS | Earth Observing System |
| LY | Light Year (usu. Ly) |
| MLS | Microwave Limb Sounder |
| MVI | Microgravity Vestibular Investigation |
| STIS | Space Telescope Imaging Spectrometer |
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