| Acronym | Meaning |
 | SCU | Signal Control Unit |
| IPS | IRIG Inertial Rate Integrating Gyro |
| CAPRI | Captive Reset Ignitor |
| SSUS | Spinning Solid Upper Stage |
| MSS | Mission Specialist Station |
| NIM | NNIM Nuclear Instrumentation Module |
| SPIF | Shuttle Payload Integration Facility |
| CCA | Communications Carrier Assembly |
| MCA | Master ControlAssembly |
| DNLT | Downlist |
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