| Acronym | Meaning |
 | R/A | Radar Altimeter |
| SI | International System Of Units (ISU Preferred) |
| COAS | Course Optical Alignment Sight |
| FRC | Flight Research Center |
| EXT | External |
| OLSP | Orbiter Logistics Support Plan |
| SLA | Support And Logistics Areas |
| IPS | Initiating Reference Document |
| S/A | Scheduled/Actual |
| SCDR | Software Critical Design Review |
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