| Acronym | Meaning |
 | APU | Auxiliary Power Unit |
| NTR | Nuclear Thermal Rocket(ry) |
| EDS | Electronic Data Systems |
| HIRDLS | High Resolution Dynamics Limb Sounder |
| IRAS | InfraRed Astronomical Satellite |
| GNC | Guidance |
| SSRMS | Space Station Remote Manipulator System |
| RASC | Royal Astronomical Society Of Canada |
| SNR | Signal To Noise Ratio / SuperNova Remnant |
| STSCI | Space Telescope Science Institute |
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