| Acronym | Meaning |
| MF | Medium Frequency (300 To 3000 KHz) |
| OR | Outer Roll |
| CDSC | Communications Distribution And Switching Center |
| PAH | PaYload Accommodations Handbook |
| OMDRI | Operations And Maintainability Data Record |
| TPC | Telemetry Preprocessor Computer |
| MTP | Master Test Plan |
| DOC | Document |
| EU | Electronic Unit |
| TOPS | Transistorized Operational Phone System |