Union Pacific Corporation (UPC) owns transportation companies. Its principal operating company, Union Pacific Railroad Company, links 23 states in the western 66% of the country. Union Pacific Railroad Company�s business mix includes agricultural products, automotive, chemicals, energy, industrial products and intermodal. Union Pacific Railroad Company connects with Canada�s rail systems and is the railroad serving six gateways to Mexico. Union Pacific Railroad Company (UPRR) is a Class I railroad operating in the United States. In June 2012, the Company�s wholly owned subsidiary, PS Technology (PST), acquired the Yard Control Systems division of Ansaldo STS USA.