| Acronym | Meaning |
 | OST | Orbiter SuPport Trolley |
| TZ | Translation Hand Controller Z-Axis Direction |
| OCDU | Optics Coupling Data Unit (G&N) |
| CR | Certification Requirement |
| RLA | Repair Line Agreement |
| SVAFB | South Vandenberg Air Force Base |
| PSID | Pounds Per Square Inch Differential |
| SG | Gnal Generator |
| ECC | Engineering Critical Component |
| SEARCHS | Shuttle Engineer' |
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