| Acronym | Meaning |
| OGO | Orbiting Geosurvey Observatories |
| DMSP | Defense Meteorological Satellite Program |
| FITS | Flexible Image Transport System |
| CDDT | Countdown Demonstration Test |
| GPC | General Purpose Computer |
| EOS | Electrophoresis Operations In Space |
| IGM | InterGalactic Medium |
| VICAR | Graphics Format Used By JPL |
| ATM | Amateur Telescope Maker |
| HUT | Hopkins Ultraviolet Telescope |