| Acronym | Meaning |
| TSTO | Two Stage To Orbit |
| SNU | Solar Neutrino Units |
| OMS | Orbital Maneuvering System |
| VMF | Voenno-Morskoy Flot |
| STSDAS | Space Telescope Science Data Analysis System |
| CDM | Cold Dark Matter |
| SEI | Space Exploration Initiative |
| NOAA | National Oceanic And Atmospheric Administration |
| ADS | Astrophysical Data System (at Havard-Smithsonian CfA) |
| MMS | Multi-mission Modular Spacecraft |