| Acronym | Meaning |
 | IOTA | International Occultation Timing Association |
| RASC | Royal Astronomical Society Of Canada |
| NTR | Nuclear Thermal Rocket(ry) |
| RCC | Reinforced Carbon-Carbon |
| FOLD | Federally-Owned LANDSAT Data |
| WIYN | Wisconsin/Indiana/Yale/NOAO Telescope |
| ARRL | American Radio Relay League |
| GGM | Goskogidromet/Gidromettsentr |
| HPOTP | High Pressure Oxidizer Turbopump |
| HRSC | High Resolution Stereo Camera |
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