| Acronym | Meaning |
| PASS | Primary Avionics Software System |
| AAO | Anglo-Australian Observatory |
| AFGWC | Air Force Global Weather Center |
| IPS | Inertial Pointing System |
| GRTLS | Glide RTLS |
| FRED | Space Station Freedom |
| LAGEOS | Laser Geodynamics Satellite |
| FIR | Far InfraRed |
| HOTOL | HOrizontal TakeOff And Landing |
| EUMETSAT | European Meterological Satellite Organisation |