| Acronym | Meaning |
 | MDCA | Main Distribution Control Assembly |
| TTLM | Through-the-Lens Light Metering |
| PSFC | Power Supply/Fuel Cell |
| SEN | Sensor |
| NCR | Nonconformance/Failure Report |
| EPCDC | Electrical Power Conditioning |
| KDU | Keyboard And DisPlay Unit |
| ICR | Instruction Change Request |
| MOV | Main Oxidizer Valve |
| SIG | GEN Signal Generator |
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