| Acronym | Meaning |
| JEM | Japanese Experiment Module |
| UDMH | Unsymmetrical DiMethyl Hydrazine |
| HTHL | Horizontal Takeoff Horizontal Landing |
| SOHO | SOlar Heliospheric Observatory |
| GPS | Global Positioning System |
| FAP | Freedom Attached Payloads |
| MIMR | Multifrequency Imaging Microwave Radiometer |
| TSTO | Two Stage To Orbit |
| PI | Principal Investigator |
| SEST | Swedish ESO Submillimeter Telescope |