| Acronym | Meaning |
 | EAR | Engineering AnalYsis Report |
| HCSI | Hughes Communications Services |
| SPOC | Shuttle Payload Operations Contractor |
| PAR | Precision Approach Radar |
| EPC | External Power Contractor |
| EDS | Electrical Distribution System |
| G/A | Ground-to-Air |
| VRL | Vertical Recovery Line |
| HAL/S | High Order Assembly Language For Shuttle Flight |
| OCR | Optical Character Recognition |
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