| Acronym | Meaning |
| MODIS-N | MODIS-Nadir |
| HAO | High Altitude Observatory |
| RHC | Rotational Hand Controller |
| AACS | Attitude And Articulation Control Subsystem |
| GSO | GeoSynchronous Earth Orbit |
| EUVE | Extreme UltraViolet Explorer |
| IUS | Inertial Upper Stage |
| ATLAS | Atmospheric Laboratory For Applications And Science |
| GHRS | Goddard High Resolution Spectrograph |
| ISU | International Space University |