| Acronym | Meaning |
 | CIU | Controller Interface Unit |
| VSWR | Visual Standing Wave Ratio |
| SMS | Shuttle Mission Simulator |
| PREVLV | Prevalve |
| R | Resistance |
| SW | Short Wave |
| MAX | Maximum |
| ECI | Earth Centered Inertia (inertials) |
| ETR | Eastern Test Range (ESME Preferred) |
| CDA | Critical Design Audit |
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