| Acronym | Meaning |
| AAVSO | American Association Of Variable Star Observers |
| HEAO | High Energy Astronomical Observatory |
| ACE | Advanced Composition Explorer |
| OCST | Office Of Commercial Space Transportation |
| LERC | Lewis Research Center |
| GGM | Goskogidromet/Gidromettsentr |
| CCD | Charge-Coupled Device |
| BMDO | Ballistic Missile Defense Office |
| SPH | Smoothed-Particle Hydrodynamics |
| SSRMS | Space Station Remote Manipulator System |