| Acronym | Meaning |
 | ST | Star Tracker |
| PTA | Potential Toxic Area |
| SSV | Space Shuttle Vehicle |
| SSIS | Space Station Information System |
| PHM | Per Hundred Million |
| MTBR | Mean Time Between Replacement |
| MEP | Main Entry Point |
| HPFT | High-pressure Fuel Turbopump |
| COM | Computer Output Microfiche |
| MLR | Monodisperse Latex Reactor |
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