| Acronym | Meaning |
 | CR | Certification Requirement |
| VHF/DF | Very High Frequency Direction Finder |
| MSFC | Marshall Space Flight Center |
| CDSC | Communications Distribution And Switching Center |
| PIP | Plant Instrumentation Program |
| SR | Status Report |
| TO | Task Order |
| WBDI | Wideband Data Interleaver |
| DRR | Data Recorder/Reproducer |
| PCIN | Program Change Identification Number |
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