| Acronym | Meaning |
 | DACS | DATA Acquisition And Control Subsystem |
| ACRV | Assured Crew Return Vehicle |
| FAST | Fast Auroral SnapshoT Explorer |
| VISSR | Visible/Infrared Spin-Scan Radiometer |
| NASA | National Aeronautics And Space Administration |
| NACA | National Advisory Committee On Aeronautics |
| MRSRM | Mars Rover And Sample Return Mission |
| IAPPP | International Amateur/Professional Photoelectric Photometry |
| IGM | InterGalactic Medium |
| ESA | European Space Agency |
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