Wal-Mart is a large global retail chain founded in 1962 by Sam Walton, with headquarters in Bentonville, Arkansas. It operates discount department stores and warehouse clubs worldwide, employing over 2.2 million people. Wal-Mart Supercenters offer a wide array of goods like groceries, general merchandise, pharmacy, and optical services under one roof for customer convenience, with many locations open 24/7.