| Acronym | Meaning |
 | GC | Ground Control |
| CCS | Command And Communication System |
| SRCBD | Software Requirements Control Board Directive |
| OSS | Office Of Space Science |
| FDM | Frequency Data Multiplexer |
| CCA | Communications Carrier Assembly |
| FHS | Forward Heat Shield |
| RNDZ | Rendezvous |
| FTE | Factory Test EquiPment |
| NAS | National Academy Of Sciences |
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