| Acronym | Meaning |
| H | MHinge Mount |
| STBY | Standby |
| NSTL | National Space Technology Laboratories |
| PICS | Photo Index And Cataloging System |
| MTTR | Mean TimetoRepair |
| PVRO | Pyrotechnics |
| CR | Certification Requirement |
| SCR | Software Change Request |
| OIS | Orbiter Instrumentation Systems |
| PSF | Processing And Storage Facility (ET) |