| Acronym | Meaning |
 | IPS | IRL Initiating Reference Letter |
| DEFL | Deflect |
| FTE | Forced Test End |
| S-BD | S-Band |
| IH/SR | Integration Hardware And Software Review |
| SEC | Secondary |
| SCDR | Shuttle Critical Design Review |
| KCS | Keyboard Configuration Studies |
| TPS | Thermal Protection System |
| DISC | Discone |
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