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Comparison of Microsoft Windows versions
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<p> <a href="/facts/Microsoft_Windows/bwhAhuSL">Microsoft Windows</a> is the name of several families of computer software operating systems created by <a href="/facts/Microsoft/nGIDDXdx">Microsoft</a>. Microsoft first introduced an operating environment named Windows in November 1985 as an add-on to <a href="/facts/MS-DOS/fVrrz1uN">MS-DOS</a> in response to the growing interest in <a href="/facts/Graphical_user_interface/wBlQFWDP">graphical user interfaces</a> (GUIs). </p><p>All versions of Microsoft Windows are <a href="/facts/Commercial_software/WLgyRFMh">commercial</a> <a href="/facts/Proprietary_software/9zcskxYL">proprietary software</a>. </p>