Borders Group, Inc. (Borders) is an operator of book, music and movie superstores and mall-based bookstores. As of January 30, 2010, Borders operated 511 superstores under the Borders name, including 508 in the United States and three in Puerto Rico. It also operated 175 mall-based and other small format bookstores, including stores operated under the Waldenbooks, Borders Express and Borders Outlet names, as well as 29 Borders-branded airport stores. It has three segments: Borders Superstores, Waldenbooks Specialty Retail stores and International stores. In July 2010, the Company sold Paperchase Products Limited to Primary Capital Limited. In February 2011, the Company filed for bankruptcy protection.