| Acronym | Meaning |
 | TARC | Through Axis Rotational Control |
| SSR | System Requirements Review |
| SLS | Spacelab Simulator |
| IECS | Igloo Environment Control Subsystem |
| EED | Electroexplosive Device |
| EST | Estimate(d) |
| CPCEI | Computer Program Contract End Item |
| MIP | Modification Instruction Package |
| I | ECO Inboard Engine Cutoff |
| B/U | Backup |
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