| Acronym | Meaning |
 | VA/T/VTA | Vibro-Acoustic/Thermal/Vacuum Test Article |
| IOP | Input/output Processor |
| PIP | Production Instrumentation Package |
| SS | System Software |
| TCA | Translation Controller Assembly |
| DCSU | Digital Computer Switching Unit |
| ESCA | Electron Spectroscopy For Chemical Analysis |
| CACB | Center Aisle Connector Bracket |
| FSS | Flight Support Station (for MMU) |
| DCC | Data Computation Complex (JSC) |
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