| Acronym | Meaning |
 | ARRL | American Radio Relay League |
| PMT | PhotoMultiplier Tube |
| BFC | Backup Flight Computer |
| NICMOS | Near Infrared Camera/Multi Object Spectrometer |
| MOPITT | Measurements Of Pollution In The Troposphere |
| SPH | Smoothed-Particle Hydrodynamics |
| STS | Shuttle Transport System / Space Transportation System |
| ASCO | Arab Satellite Communications Organization |
| UKST | United Kingdom Schmidt Telescope |
| NSA | National Security Agency |
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