| Acronym | Meaning |
 | SEI | Space Exploration Initiative |
 | ERS | Environmental Research Satellite |
 | MPESS | Multiple Purpose Experiment Support Structure |
 | GMRT | Giant Meter-wave Radio Telescope |
 | REM | Rat Enclosure Module |
 | SSF | Space Station Freedom |
 | HPFTP | High Pressure Fuel Turbopump |
 | PRTLS | Powered RTLS |
 | TOMS | Total Ozone Mapping Spectrometer |
 | USML | United States Microgravity Laboratory |