| Acronym | Meaning |
 | MCLT | Maximum Cruise Level Thrust |
| OTP | OPerational Test Procedure |
| EPA | Environmental Protection Agency |
| STS | Space Transportation System |
| LID | Leadless Inverted Device |
| SW/PM | System Management/Performance Monitor |
| HCU | Hydraulic Charging Unit |
| NFS | NNFS Nozzle Flow Sensor |
| OIC | Orbiter (Orbital) Integrated Checkout |
| POCN | Purchase Order Change Notice |
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