| Acronym | Meaning |
| OML | Orbiter Mold Line |
| T/D | Touchdown |
| SCCM | Standard Cubic Centimeters Per Minute |
| OPRV | Oxygen Pressure Relief Valve |
| IP | Instrumentation/pulse Code Modulation Master Unit Data Bus |
| LO | Local Oscillator |
| PM | PMADPerformance Monitor Annunciation Driver |
| ITA | Integrated Test Area |
| ARC | Ames Research Center |
| SAB | Shuttle Avionics Breadboard |