Northrop Grumman was formed in 1994 from the merger of Northrop Corporation and Grumman Corporation. Northrop Grumman is the world's fourth largest weapons manufacturer (2010 data) and the world's largest naval ship manufacturer and radar manufacturer. The company includes the information service systems department, power systems department, aerospace department and shipbuilding department. Northrop Grumman's Northrop Grumman shipyard is the world's largest privately owned shipyard and is capable of building Nimitz-class aircraft carriers.