
Windows is the most popular desktop operating system in the world, with 75% market share as of April 2022 according to StatCounter.

The first version of Windows was released on November 20, 1985, as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUIs). Defunct Windows families include Windows 9x, Windows Mobile and Windows Phone. Each family caters to a certain sector of the computing industry, for example Windows NT for consumers, Windows Server for servers, and Windows IoT for embedded systems. Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Windows 9x and earlier: Monolithic ( MS-DOS).

