| Acronym | Meaning |
 | SSFS | Space Shuttle Functional Simulator |
| RHM | Relative Humidity Monitor |
| SSTC | Space Shuttle Test Conductor |
| ESSA | Environmental Sciences Services Administration |
| EA | Elevation Angle |
| POCN | Purchase Order Change Notice |
| PCCP | Preliminary Contract Change ProPosal |
| SPEC | Specification |
| NRTS | Not Repairable At This Station |
| QCOP | Quality Control Operating Procedure |
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