| Acronym | Meaning |
| STARCAL | Star Calibration |
| IGM | InterGalactic Medium |
| APL | Applied Physics Laboratory (at Johns Hopkins) |
| ASCO | Arab Satellite Communications Organization |
| FFCC | Free-Flyer Control Centre |
| LMC | Large Magellanic Cloud |
| NERVA | Nuclear Engine For Rocket Vehicle Application |
| LEST | Large Earth-based Solar Telescope |
| S/C | SpaceCraft |
| GCVS | General Catalog Of Variable Stars |