| Acronym | Meaning |
 | ED | Engineering Directive |
| HAS | Hydraulic Actuation System |
| CLS | Contingency Landing Site(s) |
| OFK | OPtical Flight Kit |
| PTO | Participating Test Organizations |
| LB | Load Bank |
| FQI | Flight Qualification Instrumentation |
| RGAL | Rate Gyro Assembly-Left SRB |
| TA | Task Analysis |
| UBIC | Universal Bus Interface Controller |
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