| Acronym | Meaning |
 | TPS | Thermal Protection System |
| RIACS | Research Institute For Advanced Computer Science |
| GRTLS | Glide RTLS |
| ENAP | Energetic Neutral Atom Precipitation |
| FRED | Space Station Freedom |
| IGM | InterGalactic Medium |
| HALOE | Halogen Occultation Experiment |
| SEP | Societe Europeenne De Propulsion |
| SLAR | Side-Looking Airborne Radar |
| NASP | National AeroSpace Plane |
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