microsoft windows

Microsoft Windows
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"Windows" redirects here. For the part of a building, see Window. For other uses, see Windows (disambiguation).
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Microsoft Windows Windows logo
Windows 7 desktop
Windows 7 desktop
Company / developer Microsoft
OS family MS-DOS/Windows 9x-based, Windows CE, Windows NT
Working state Publicly released
Source model Closed source / Shared source
Latest stable release Windows 7, Windows Server 2008 R2
NT 6.1 Build 7600 (7600.16385.090713-1255) (October 22, 2009; 3 month(s) ago (2009-10-22)) [+/−]
Latest unstable release [+/−]
License MS-EULA
Official Website Official website

Microsoft Windows is a series of software operating systems and graphical user interfaces produced by Microsoft. Microsoft first introduced an operating environment named Windows in November 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces (GUIs).[1] Microsoft Windows came to dominate the world's personal computer market, overtaking Mac OS, which had been introduced previously. As of October 2009, Windows had approximately 91% of the market share of the client operating systems for usage on the Internet.[2][3][4] The most recent client version of Windows is Windows 7; the most recent server version is Windows Server 2008 R2; the most recent mobile device version is Windows Mobile