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Windows logo and wordmark - 2012.svg
Company Microsoft
Initial Release November 20, 1985
Marketing Target Personal Computing
License Proprietary Software
Website www.windows.microsoft.com

Microsoft Windows is a series of graphical interface operating systems developed, marketed, and sold by Microsoft.

Microsoft introduced an operating environment named Windows on November 20, 1985 as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUIs). Microsoft Windows came to dominate the world's personal computer market with over 90% market share, overtaking Mac OS, which had been introduced in 1984.

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