| Acronym | Meaning |
 | WCCU | Wireless Crew Communication Unit |
| DCC | Display COMPuter Control Unit |
| INTERFACE | FInterface Functional Analysis |
| JCP | Joint Power Conditions |
| FDO | Fee Determination Official |
| SPL | Sound Pressure Level |
| ERTS | Earth Resources Technology Satellite |
| DARTS | Digital Automated Radar Tracking System |
| EXEC | Execute |
| MIS | Mission Information Subsystem |
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