Northrop Grumman Corporation provides products, services and solutions in defense and commercial electronics, nuclear and non-nuclear shipbuilding, information technology, mission systems, systems integration and space technology. As prime contractor, principal subcontractor, partner or preferred supplier, Northrop Grumman participates in many defense and commercial technology programs in the United States and abroad. The majority of the Company's products and services are ultimately sold to the United States Government, which accounted for 86.7% of total revenue in 2003. Northrop Grumman operates in seven business sectors: Electronic Systems, Newport News, Ship Systems, Information Technology, Mission Systems, Integrated Systems and Space Technology. In January 2005, the Company sold its Canadian navigation systems and space sensors system business to L-3 Communications.