Packaging Corporation of America manufactures a range of linerboard and corrugating medium at four containerboard mills, as well as a variety of corrugated packaging products at 68 corrugated products plants, including: Conventional shipping containers used to protect and transport manufactured goods; Multi-color boxes and displays used to merchandise products in retail locations; and Special design/application boxes used in the food and agriculture industry. In 2008, PCA produced about 2.35 million tons of containerboard and shipped about 30.3 billion square feet (BSF) of corrugated products, which produced net sales of $2.4 billion. The company employs approximately 8,100 people nationwide.