First Windows System -

Apple Computer, Inc. also viewed Windows 1.0 as a copyright infringement, leading to a protracted legal battle over the "look and feel" of the GUI. This rivalry defined the competitive landscape of the late 1980s.

Technically, the first Windows wasn't a standalone OS. It was a "graphical operating environment" that ran on top of . Think of it as a fancy visual skin that made the complex commands of DOS accessible through clicking rather than typing. 2. Tiled, Not Overlapping first windows system