Northrop Grumman Corporation (Northrop Grumman) provides products, services, and integrated solutions in aerospace, electronics, information and services to its global customers. As of December 31, 2011, the Company operated in four segments: Aerospace Systems, Electronic Systems, Information Systems and Technical Services. The Company conducts most of its business with the United States Government, principally the Department of Defense (DoD) and intelligence community. It also conducts business with local, state, and foreign Governments and domestic and international commercial customers. Effective as of March 31, 2011, the company completed the spin-off of Huntington Ingalls Industries, Inc. (HII). HII operates the Company's former shipbuilding business. In September 2012, it acquired M5 Network Security Pty Ltd.