| Acronym | Meaning |
 | MACDS | Monitor And Control Display System |
| ECP | Engineering Control Proposal |
| OC | Quality Control |
| SSI | Significant Structural Item |
| GS | Gas Servicer |
| EMA | Electromagnetic Analysis |
| DU | Display Unit |
| NNI-I | NASA Standard Initiator-Type I (was SMSI) |
| DACS | Digital Acquisition And Control System |
| PLL | Phase Locked Loop |
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