Dell Inc. ( ), an American computer-hardware company based in Round Rock, Texas, develops, manufactures, sells and supports a wide range of personal computers, servers, data storage devices, network switches, personal digital assistants (PDAs), software, computer peripherals, and more. As of 2006 Dell employs more than 63,700 people worldwide and manufactures more computers than any other organization in the world. According to the Fortune 500 2006 list, Dell ranks as the 25th-largest company in the United States by revenue.