| Acronym | Meaning |
 | ICB | Interim Change Bulletin |
| SPIMS | Shuttle Program Information Management System |
| IPS | ISD Instructional Systems DeveloPment (USAF) |
| HL | Heel Line |
| PSS | Propulsion Support System |
| TT | Total Time |
| MRA | Mechanical Readiness Assessment |
| TPM | Terminal Phase Maneuver |
| VERT | Vertical |
| GAPL | Group Assembly Parts List |
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