| Acronym | Meaning |
![](file.png) | ECP | Engineering Control Proposal |
![](file.png) | VPHD | Vertical Payload Handling Device |
![](file.png) | SIS | Shuttle Information System |
![](file.png) | PFC | Power Factor Corrector |
![](file.png) | CISS | Centaur Integrated Support Structure |
![](file.png) | LES | Launch Equipment Shop |
![](file.png) | DRC | Data Reduction Center |
![](file.png) | DACBU | Data Acquisition And Control Buffer Unit |
![](file.png) | MVA | Main Valve Actuator |
![](file.png) | NMI | Nautical Miles |