| Acronym | Meaning |
| ORFEUS | Orbiting And Retrievable Far And Extreme Ultraviolet Spectrometer |
| CIT | Circumstellar Imaging Telescope |
| PAM | Payload Assist Module |
| ERS | European Remote Sensing |
| CM | Center Of Mass |
| NRSC | National Remote Sensing Centre |
| IRAS | InfraRed Astronomical Satellite |
| ORBI | Stock Ticker Symbol For OSC |
| HAO | High Altitude Observatory |
| FRED | Space Station Freedom |