Northrop Grumman Corp — Northrop Grumman Corporation operates as an aerospace and defense technology company in the United States, Asia/Pacific, Europe, and internationally. It operates through four segments: Aeronautics Systems, Defense Systems, Mission Systems and Space Systems. The Aeronautics Systems segment designs, develops, produces, integrates, sustains, and modernizes aircraft systems. This segment also offers unmanned autonomous aircraft systems, including high-altitude long-endurance strategic, surveillance and reconnaissance systems; and strategic long-range strike aircraft, tactical fighter and air domin….· via yahoo