Packaging Corporation of America specializes in the manufacture of containerboard and corrugated packaging. The company focuses on a single line of business to achieve operational success. Its nearly 70 converting operations produce a wide variety of corrugated packaging products, including conventional shipping containers used to protect and transport goods. PCA also produces multicolor boxes and displays that help to merchandise packaged products in retail locations. The company is based in Lake Forest, Ill. In 2004, PCA produced more than 2 million tons of containerboard, shipped nearly 30 billion square feet of corrugated products and produced an excess of 1.5 million tons of Kraft linerboard at its mills in Counce, Tenn., and Valdosta, Ga. Packaging Corporation of America maintains a location in Lancaster, Pa.