| Acronym | Meaning |
| PLDM | PayloadManagement |
| EXT | Extension |
| DC | Defense Contract Administration Services |
| DDC | Defense Documentation Center |
| ORD | Operational Readiness Date |
| ORB | Orbit |
| IUS | Interim/intermediate UPper State |
| SIS | Software Implementation Specification |
| MCA | Master ControlAssembly |
| SRU | ShOP-Replaceable Unit |