| Acronym | Meaning |
| CMBR | Cosmic Microwave Background Radiation |
| LEST | Large Earth-based Solar Telescope |
| ARRL | American Radio Relay League |
| MMT | Multiple Mirror Telescope |
| SAT | Synthetic Aperture Telescope |
| SLAR | Side-Looking Airborne Radar |
| FGS | Fine Guidance Sensors |
| GEM | Giotto Extended Mission |
| FOLD | Federally-Owned LANDSAT Data |
| IBSS | Infrared Background Signature Survey |