What is "windows"

Microsoft Windows is a family of operating systems created by Microsoft, a company founded by Bill Gates and Paul Allen. Prior to the NT version, it was a graphical interface to the MS-DOS operating system. Windows is a commercial product, with differentiated prices for each of its versions.

It is the most widely used operating system on personal computers in the world. The impact of this system on the world today is very large due to the huge number of copies installed. Minimum knowledge of this system, its functioning, its history and its context are, in the view of many, indispensable, even for the laity in computer science. The current stable version of Windows for desktops is Windows 8.1, released on October 17, 2013. For servers Windows Server 2012 is the latest and stable version.