| Acronym | Meaning |
 | POR | Point Of Resolution |
| PED | Pedal |
| OML | Orbiter Mold Line |
| ECA | Engineering Change Analysis |
| SM | IASerial Multiplexer Interface Adapter |
| SDR | Space Division Regulation |
| ETSS | External Tank Separation Subsystem |
| RTD | Real-Time Display |
| PCCE | Payload Common Communication Equipment |
| RJ/EC | Reaction Jet/Engine Control |
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