The Home Depot, Inc. operates as a home improvement retailer primarily in the United States, Canada, and Mexico. It operates The Home Depot stores, which sell building materials, home improvement supplies, and lawn and garden products to do-it-yourself customers, do-it-for-me customers, home improvement contractors, tradespeople, and building maintenance professionals. The company also operates The Home Depot and EXPO Design Center stores that offer various installation services, which include products, such as carpeting, flooring, cabinets, countertops, and water heaters primarily to business-to-business customers, including home builders, professional contractors, municipalities, and maintenance professionals; and provides professional installation of various products through its in-home sales programs, such as generators and furnace, and central air systems. In addition, the company offers credit purchase programs through third-party credit providers to professional, do-it-yourself, and do-it-for-me customers. It also offers its products through catalog and online sales businesses. As of August 30, 2007, the company operated 2,206 retail stores in 50 states, the District of Columbia, Puerto Rico, the U.S. Virgin Islands, 10 Canadian provinces, Mexico, and China. The Home Depot, Inc. was founded in 1978 and is based in Atlanta, Georgia.