Windows Operating System. Win 3.1. (3.x.) (Microsoft®)

The transition of the Windows operations systems to Win 3.x versions with an integrated MS-DOS level launched by Microsoft® the story of the (first cooperative, then preemptive) multitasking, that is the (apparently) parallel use of Microsoft programs on the Windows platform. This was also the start of the triumphal march of the GUIs, i.e. the use of the graphic user interface on Windows systems. Apple computers already had this benefit in the eighties. Added to that the 16-bit has been gradually replaced by the 32-bit processor architecture.

Although many new operating systems (such as Win 95, Win 98, Win ME, Win NT, Win XP, Windows Server 2003) have already followed on the clients level as well as on the server level and the 64-bit-architecture, which has become a hardware standard, there surprisingly still is a demand for licenses for these somehow historical operating systems.

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