| Acronym | Meaning |
| RSS | Root Sum Square |
| SFACI | Software Flight Article Configuration Inspection |
| TPS | Thermal Protection System (SR[3 |
| HPU | Hydraulic Power Unit |
| SBA | Structure Borne Acoustic |
| EEIS | End-to-End Information System |
| MWG | MMWG Maintenance Analyzer Working Group |
| HTR | HydroxYl Terminated Polybutyiene |
| SHTR | Shutter |
| MS | Mating Sequence And Control |