| Acronym | Meaning |
 | TOPS | Toward Other Planetary Systems |
| SIR | Shuttle Imaging Radar |
| ENACEOS | ENAC For EOS |
| ER | Eastern Range |
| CCDS | Centers For The Commercial Development Of Space |
| OV | Orbital Vehicle |
| OAO | Orbiting Astronomical Observatory |
| COMSAT | Communications Satellite (Corporation) |
| FAP | Freedom Attached Payloads |
| AAS | American Astronautical Society |
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