| Acronym | Meaning |
 | CHCS | Cabin Humidity Control Subsystem |
| OSO | Ocean SYstems Operation |
| OCR | Optical Character Recognition |
| NDI | Nondestructive Inspection |
| MAIDS | Management Automated Information Display System |
| OPR | Orbiter/Payload Recorder |
| SSMECA | Space Shuttle Main Engine Controller Assembly |
| SBA | Structure Borne Acoustic |
| PVA | Propellant Valve Actuator |
| ORCHIS | System |
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