AutoZone, Inc. is an American retailer of aftermarket automotive parts and accessories, the largest in the United States. Founded in 1979, AutoZone has over 6,400 stores across the United States, Mexico, Puerto Rico and Brazil. The company is based in Memphis, Tennessee. Originally a division of Memphis-based wholesale grocer Malone & Hyde, the company was known as Auto Shack. After the sale of the grocery operation to the Fleming Companies of Oklahoma City, Oklahoma, the name of the company was changed to AutoZone to reflect the new focus and to settle a lawsuit brought by Tandy Corporation for infringing on Tandy's "Radio Shack" trademark.