| Acronym | Meaning |
 | HIRS | High Resolution Infrared Radiation Sounder |
| RCT | Radiometric Calibration Target |
| RPM | Retro Propulsion Module |
| SRB | Solid Rocket Booster |
| HOTOL | HOrizontal TakeOff And Landing |
| DRAO | Dominion Radio Astrophysical Observatory |
| GSC | Guide Star Catalog |
| ARRL | American Radio Relay League |
| SSPO | Space Shuttle Program Office |
| TPS | Thermal Protection System |
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