| Acronym | Meaning |
 | CNWDI | Critical Nuclear Weapons Design Information |
| TOPS | Transistorized Operational Phone System |
| MACDS | Monitor And Control Display System |
| IDRD | Information Definition Requirements Document |
| EO | Earth Orbit |
| MB | Main Bus |
| MSK | Manual Select KeYboard |
| NARS | National Archives And Record Services |
| SV | Safety Valve |
| NETCOM | NNETCOMNetwork Communications |
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