| Acronym | Meaning |
 | ECRA | Engineering Change Request/Authorization |
| MSS | Mission Status Summary |
| SCN | Specification Change Notice |
| SSPGSE | Space Shuttle Program Ground Support Equipment |
| DP | Double Pole |
| VCTR | Vector |
| OPF | Orbiter Processing Facility |
| IG | Igloo |
| TT&C | Tracking Telemetry And Control |
| EED | Electro (Electrical) Explosive Device |
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