So when Xerox created the world’s first graphical user interface-based operating system, “close” has to be the button they came up with first, right? Wrong.

Apple to Open Source Its First Graphical OS From the Lisa. ... at 7.8MHz instead of 5MHz, the 6800K CPU and video controller can't simultaneously communicate with system RAM.

Microsoft followed it with Windows 2.0 in December 1987, 3.0 in May 1990 and 3.1 in April 1992. In July 1993, Microsoft released Windows NT, a more robust operating system built from scratch.

First, graphical operating systems were rare when the NES launched in 1986. The two predominant computer interfaces were MS-DOS on the PC and ProDOS on the Apple IIc, both prompt-based systems.

Lisa was a cutting-edge machine and one of the first to offer consumers a GUI, mouse, and file system, but it was prohibitively expensive and didn’t catch on. Adjusted for inflation, it cost ...

The world of Windows has changed quite a bit since then, but the operating system's launch was a major step in personal computing. Windows 1.0 was the first graphical user interface for MS-DOS.