| Acronym | Meaning |
 | MRCR | Measurement Requirement Change Request |
| CRSVR | Crossover |
| SHDN | Shutdown |
| OSOP | Orbiter Systems Operating Procedures |
| MS | Military Standard (Parts Designation) |
| RETRO | Retrofire Officer |
| BAC | Booster Assembly Contractor |
| PICRS | Program Information Coordination And Review |
| NOMINAL | PerNominal Percent Defective |
| SP-OPI | Shuttle) |
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