| Acronym | Meaning |
| ALEXIS | Array Of Low Energy X-ray Imaging Sensors |
| PRTLS | Powered RTLS |
| SPDM | Special Purpose Dextrous Manipulator |
| NIMS | Near Infrared Mapping Spectrometer |
| ECS | Environmental Control System |
| SDI | Strategic Defense Initiative |
| FWHM | Full Width At Half Maximum |
| AGE | Auxiliary Ground Equipment |
| JPL | Jet Propulsion Laboratory |
| LMC | Large Magellanic Cloud |