Microsoft is the world's leading producer of computer software, developing and selling operating systems, software, and personal computers. Headquartered in Redmond, Washington, Microsoft was founded in 1975 by Bill Gates and Paul Allen and currently employs over 127,000 people worldwide. In addition to competing with Apple, Google, and Oracle, Microsoft plans to expand operations in Hyderabad and release Windows 10 and the Cortana personal assistant in 2015.