Microsoft Corporation is a multinational software company headquartered in Redmond, Washington. It was founded in 1975 by Bill Gates and Paul Allen and has grown to employ over 90,000 employees worldwide serving over 1 billion users. Microsoft is best known for its Windows operating systems, Office productivity software, Xbox video game consoles, and Bing search engine. It has acquired several major companies over the years including Skype, Nokia, LinkedIn, and Hotmail to expand its business offerings.