| Acronym | Meaning |
| IRAF | Image Reduction And Analysis Facility |
| LGA | Low Gain Antenna |
| GDS | Great Dark Spot |
| SAIL | Shuttle Avionics Integration Laboratory |
| MMU | Manned Maneuvering Unit |
| STSDAS | Space Telescope Science Data Analysis System |
| ALEXIS | Array Of Low Energy X-ray Imaging Sensors |
| AEPI | Atmospheric Emissions Photometric Imaging |
| HOTOL | HOrizontal TakeOff And Landing |
| GSC | Guide Star Catalog |