| Acronym | Meaning |
 | SCDR | Seller Critical Design Review |
| OOT | Out Of Tolerance |
| LOLI | Limited Operational-Life Items |
| FREO | DIV FrequencY Divider |
| IOB | InPut/Output Buffer |
| SGOS | Shuttle Ground Operations Simulation (Simulator) |
| GOSS | GrGOSSGround Operations Support System |
| OPT | Option |
| EPPS | Electrical Power/Pyro Sequential System |
| EMCD | Electro-Mechanical Control Diagram |
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