Wal-Mart Stores, the nation’s largest retailer, said Thursday it was dropping Amazon’s Kindle tablets and e-readers, a sign of how seriously it views Amazon as a competitor in the consumer goods market. The Kindle Fire can be used for movies, games, and potentially anything Amazon sells, thanks to a built-in Web browser. Target said in May that it would stop selling Kindles, though other stores, including Best Buy, Staples and Office Depot, said Thursday they would continue to carry the devices.
