| Acronym | Meaning |
 | NPC | NASA Publication Control |
| IPS | IRIS Italian Research Interim Stage |
| FSR | Flight Specific Requirements |
| DRM | Drawing Requirements Manual |
| COD | Center Operations Directorate (JSC) |
| MG | Middle Gimbal (YAW) |
| FDS | Fluid Distribution System |
| BTC | Bus Tie Contractor |
| EMS | Engineering Master Schedule |
| ISI | Initial Systems Installation |
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