| Acronym | Meaning |
| SNG | Sodruzhestva Nezabisimikh Gosudarst |
| WUPPE | Wisconsin Ultraviolet PhotoPolarimter Experiment |
| MACHO | MAssive Compact Halo Object |
| LGM | Little Green Men |
| SME | Solar Mesosphere Explorer |
| PCGG | PCG Glovebox |
| MOMS | Modular Optoelectronic Multispectral/Stereo Scanner |
| BFCS | Backup Flight Control System |
| STS | Shuttle Transport System / Space Transportation System |
| OAO | Orbiting Astronomical Observatory |