United States Steel Corporation (U. S. Steel) is an integrated steel producer of flat-rolled and tubular products with production ope. S. Steel is also engaged in other business activities consisting primarily of transportation services (railroad and barge operations) and real estate operations. rations in North America and Europe. The Company operates in three segments: Flat-rolled Products (Flat-rolled), U. S. Steel Europe (USSE) and Tubular Products (Tubular). U. S. Steel owns, develops and manages various real estate assets, which include approximately 200,000 acres of surface rights primarily in Alabama, Illinois, Maryland, Michigan, Minnesota and Pennsylvania. In addition, U. S. Steel participates in joint ventures that are developing real estate projects in Alabama, Maryland and Illinois. U. S. Steel also owns approximately 4,000 acres of land in Ontario, Canada.