| Acronym | Meaning |
 | E&D | Engineering And DeveloPment Directorate (JSC) |
| RSS | Rotating Service Structure |
| WBS | Work Breakdown Structure |
| RTG | Range (Slant) To Ground |
| SAAM | Special Air Force Airlift Mission |
| SCNP | Preliminary Specification Change Notice |
| PCEM | Propulsion Contamination Effects Module |
| SL | SPacelab |
| DACT | DisPosable Absorption Collection Trunk |
| NC | Normally Closed |
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