| Acronym | Meaning |
| LCOM | Logic Control OutPut Module |
| TCSSS | Thermal Control Subsystem Segment |
| QAVT | Qualification For Acceptance Vibration Testing |
| V | Valve |
| CCL | Commonality Candidate List |
| RRI | Rendezvous Radar Indicator |
| OMR | Orbiter Management Review |
| U | Uranium |
| ELECTR | Electronics |
| PRL | Priority Rate Limiting |