Orbital ATK, Inc. is an aerospace and defense systems company and supplier of related products to the United States Government, allied nations, prime contractors and other customers. The Company's segments include Flight Systems Group, Defense Systems Group, Space Systems Group and Corporate. Its products include launch vehicles and related propulsion systems; satellites and associated components and services; tactical missiles, subsystems and defense electronics, and precision weapons, armament systems and ammunition. The Flight Systems Group segment consists of Launch Vehicles Division, Propulsion Systems Division and Aerospace Structures Division. The Defense Systems Group segment consists of Armament Systems Division, Defense Electronic Division, Missile Products Division and Small Caliber Systems Division. The Space Systems Group consists of Commercial Satellites Division, Government Satellites Division, Space Components Division and Technical Services Division.