| Acronym | Meaning |
| SRU | Space Replaceable Units |
| VO | Shuttle Operations (KSC Directorate) |
| RAX | Remote Access Terminal |
| OMP | Operations And Maintenance Plan |
| LPOT | Low-pressure Oxidizer Turbopump |
| GSO | Ground Systems Operations |
| TG | Ground Systems (KSC Directorate) |
| EIASN | End Item Assembly Sequence Number |
| RMS | Root Mean Square |
| OMS | Orbital Maneuvering System |