| Acronym | Meaning |
| OPPAR | Orbiter Project(s) Parts Authorization Request |
| LRO | Large Radio Observatory |
| PM | PMAPPerformance Monitor Annunciation Panel |
| IPS | Instrument Pointing System (Subsystem) |
| M | Isc Miscel Laneous |
| PPC | Phased Provisioning Code |
| ISL/LAR | Integrated Logistics System And Logistics Assessment |
| SVC | Supervisor Call |
| LDT | Linear Displacement Transducer |
| SRM | Solid Rocket Motor |