| Acronym | Meaning |
 | IOA | Input/Output Adapter |
| LEM | Launch Escape Monitor |
| LVDT | Linear Voltage Differential Transformer |
| CDRL | Contract Data Requirements List |
| CIS | Communications Interface System |
| RSD | Requirements And Specifications Document |
| SM | IASerial Multiplexer Interface Adapter |
| GIA | GPC Interface Adapter |
| MDCS | Maintenance Data Collection System |
| GCOS | General Computer Operational System |
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