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Did you know...

  • ...that Windows XP build 2223 had commented out code in its Business theme file that would allow the user to configure different colors based on its settings?
  • ...that Apple has officially released several developer releases of what would later become Mac OS X for the x86 architecture as a part of its NeXT legacy, and secretly continued to maintain the port until Tiger?
  • ...that Windows Server 2003 has been renamed four times during development, before settling on its final name?
  • ...that Windows 98 build 1387 has a hidden button in display properties to enable title bar gradients, and is also the first build of Windows to support this feature?
  • ...that no build of Windows Vista (including pre-reset) actually used or even included the widespread Longhorn sound scheme?
  • ...that Windows 95 build 58s includes a hidden tabbed mode in the Cabinet?

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Microsoft Windows, commonly referred to as Windows, is a family of proprietary graphical operating systems developed by Microsoft, which includes various products for different markets and industries that use a similar user interface and feature set. The original version of Windows was an operating environment that ran on top of MS-DOS, although later versions increasingly took on the characteristics of a full operating system. Since Windows XP, all desktop versions of Windows use the portable NT hybrid kernel that does not rely on MS-DOS.

The Windows family currently encompasses the main consumer version named simply Windows, as well as Windows Server for the server market and Windows IoT for the embedded market, although they are all based on the common desktop Windows codebase. In the past, the family also included Windows RT for ARM-based tablets, Windows Phone and Windows Mobile for smartphones, Windows Embedded Compact, or the MS-DOS based line.