| Acronym | Meaning |
 | MDT | Mountain Daylight Time |
| KBU | Keyboard Unit |
| R&CC | Recorder And Communication Control |
| TFU | Test Facility Utilization |
| E&D | Engineering And Development |
| MCC-H | Mission Control Center-Houston |
| IDS | Interface Data Sheet |
| DDPC | Digital Data Processing Center (Complex) |
| APID | Applications Process Identification |
| INSTRUMENT | Checkout Equipment |
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