| Acronym | Meaning |
| VRM | Venus Radar Mapper |
| MOL | Manned Orbiting Laboratory |
| XMM | X-ray Multi Mirror |
| CRIM | Commercial Refrigerator Incubator Module |
| ADEOS | Advanced Earth Observing Satellite |
| ROSAT | ROentgen Satellite |
| STDCE | Surface Tension Driven Convection Experment |
| TOS | Transfer Orbit Stage |
| CM | Central Meridian |
| AEPI | Atmospheric Emissions Photometric Imaging |