| Acronym | Meaning |
 | VICAR | Graphics Format Used By JPL |
| BMDO | Ballistic Missile Defense Office |
| PEM | Payload Electronics Module |
| UGC | Uppsala General Catalog |
| CHARA | Center For High Angular Resolution Astronomy |
| ESRO | European Space Research Organisation |
| MMS | Multi-mission Modular Spacecraft |
| ENACEOS | ENAC For EOS |
| ORBI | Stock Ticker Symbol For OSC |
| ACRV | Astronaut Crew Rescue Vehicle |
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