| Acronym | Meaning |
| INMARSAT | International Maritime Satellite |
| M | Messier |
| MCCC | Maragone Convection On Closed Containers |
| HH | Hitchhiker |
| ENAP | Energetic Neutral Atom Precipitation |
| PN | Planetary Nebula |
| ISM | InterStellar Medium |
| EROS | Earth Resources Observations System |
| TES | Thermal Emission Spectrometer |
| PLSS | Portable Life Support System |