| Acronym | Meaning |
 | HAL | Houston Aerospace Language |
| PCTE | Portable Commercial Test Equipment |
| TAO | Trans-Atlantic Abort |
| GLAADS | Gun Low Altitude Air Defense System |
| STP | Space Technology Payload |
| OTP | Operations Turnaround Plan |
| PDS | Problem Data System |
| OAS | Orbiter Avionics System |
| FCS | Flight Control System (Subsystem) |
| SIR | Software Initiated Restart |
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