USX-Delhi Group. The principal activities of the Company are conducted through the following 3 Groups:MARATHON GROUP: is engaged in worldwide exploration, production, transportation and marketing of crude oil and natural gas; and domestic refining, marketing and transportation of petroleum products.STEEL GROUP: is primarily engaged in the production and sale of a wide range of steel mill products, coke and taconite pellets. The Steel Group also includes the management of mineral resources, domestic coal mining, and engineering and consulting services and technology licensing. Other businesses that are part of the Group include real estate development and management, and leasing and financing activities.DELHI GROUP: is engaged in the purchasing, gathering, processing, transporting and marketing of natural gas.