Orbital Sciences Corporation develops and manufactures rockets and space systems for commercial, military and civil government customers, including the United States Department of Defense (DoD), the National Aeronautics and Space Administration (NASA), other Unites States Government agencies and commercial satellite operators. The Company operates in three segments, including launch vehicles, satellites and space systems, and advanced space programs. Launch Vehicles segment includes rockets that are used as space launch vehicles. Satellites and Space Systems segment satellites that are used to enable communications and broadcasting, conduct space-related scientific research, other deep-space exploration missions and demonstrate new space technologies. Advanced Space Programs segment includes human-rated space systems for Earth-orbit and deep-space exploration, and satellites used for national security space programs and to demonstrate new space technologies.