| Acronym | Meaning |
| EMU | Extravehicular Mobility Unit |
| NSI | NASA Science Internet / NASA Standard Initiator / National Environmental Satellite Data And Information Service |
| GISS | Goddard Institute For Space Studies |
| CRRES | Combined Release/Radiation Effects Satellite |
| COMPTEL | COMPton TELescope |
| OSSA | Office Of Space Science And Applications |
| CFC | ChloroFluoroCarbon |
| JPL | Jet Propulsion Laboratory |
| MACHO | MAssive Compact Halo Object |
| ET | External Tank |