Northrop Grumman Corporation is a global aerospace and defense technology company. Its segments include Aeronautics Systems, Defense Systems, Mission Systems, and Space Systems. Aeronautics Systems is engaged in the design, development, production, integration, sustainment and modernization of military aircraft systems for the United States Air Force, the United States Navy, other United States government agencies, and international customers. Defense Systems is engaged in the design, engineering, development, integration, and manufacturing of deterrent systems, advanced tactical weapons, and missile defense solutions. Mission Systems is a provider of mission solutions and multifunction systems. Its products and services include command, control, communications and computers, and reconnaissance (C4ISR) systems. Space Systems delivers end-to-end mission solutions through the design, development, integration, production and operation of space, missile defense, and launch systems.