| Acronym | Meaning |
| CSA | Canadian Space Agency |
| XMM | X-ray Multi Mirror |
| HRPT | High Resolution Picture Transmission |
| CFC | ChloroFluoroCarbon |
| VTVL | Vertical Takeoff Vertical Landing |
| WR | Western Range |
| UBM | Unpressurized Berthing Mechanism |
| ORFEUS | Orbiting And Retrievable Far And Extreme Ultraviolet Spectrometer |
| NASDA | NAtional Space Development Agency |
| UKST | United Kingdom Schmidt Telescope |