| Acronym | Meaning |
 | SSL | System Software Loader |
| LL | Lever Lock |
| LCO | MMCUniform Central Number |
| HL | Heel Line |
| PFP | Programmable Function Panel |
| CFY | Company Fiscal Year |
| RTG | Radioisotope Thermoelectric Generator |
| NNI-I | NASA Standard Initiator-Type I (was SMSI) |
| SBTC | Speed Brake/thrust Controller |
| PCCP | Preliminary Contract Change ProPosal |
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