| Acronym | Meaning |
 | SEC | Sequential Events Controller |
| SDRB | Software Design Review Board |
| OASCB | Orbiter Avionics Software Control Board |
| VR | Video Recorder |
| ROM | Read-Only Memory |
| PCC | Pad Control Center |
| SVRR | Software Verifir-ation Readiness Review |
| TPM | Technical Performance Measurement (System) |
| OAST | Office Of Aeronautics And Space Technology |
| VFR | Visual Flight Rules |
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