| Acronym | Meaning |
 | GTO | Geostationary Transfer Orbit |
| MSFC | Marshall Space Flight Center |
| NOCC | Network Operations Control Center |
| GMC | Giant Molecular Cloud |
| CASCA | Canadian Astronomical Society |
| HPFTP | High Pressure Fuel Turbopump |
| CFF | Columbus Free Flyer |
| SNU | Solar Neutrino Units |
| ETM | Enhanced Thematic Mapper |
| CDS | Command And Data Subsystem |
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