| Acronym | Meaning |
 | GTO | Geostationary Transfer Orbit |
| WFF | Wallops Flight Facility |
| ORFEUS | Orbiting And Retrievable Far And Extreme Ultraviolet Spectrometer |
| EUV | Extreme UltraViolet |
| LY | Light Year (usu. Ly) |
| CMCC | Central Mission Control Centre |
| DCA | Defense Communications Agency |
| RTLS | Return To Launch Site |
| CADH | Communications And Data Handling |
| RF | Radio Frequency |
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