From http://www.generaldynamics.com/:
Defense industry contractor for shipbuilding and marine systems, defense systems, land and amphibious combat systems and munitions
From Wikipedia: General Dynamics:
General Dynamics Corporation is a U.S. defense conglomerate formed by mergers and divestitures, and as of 2008 it is the fifth largest defense contractor in the world. The company has changed markedly in the post-Cold War era of defense consolidation. The company has four main business segments: Marine Systems, Combat Systems, Information Systems and Technology, and Aerospace. The company's former Fort Worth Division manufactured the F-16 Fighting Falcon, the most-produced Western jet fighter, but that subsidiary was sold to Lockheed in 1993. GD reentered the airframe business in 1999 with their purchase of Gulfstream Aerospace.