Windows 2

Windows 2.0 is a version of the Microsoft Windows graphical user interface-based operating environment that superseded Windows 1.0. Windows 2.0 was said to more closely match Microsoft's pre-release publicity for Windows 1.0 than Windows 1.0 did.
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<operating system> The second version of Microsoft Windows, released in 1987. Windows 2 had considerably more features than Windows 1, such as overlapping windows and icons. When Windows/386 was released, Windows 2 was renamed Windows/286.