It would be the operating system that would launch a legacy—the first version of Microsoft Windows for Personal Computers was launched on November 20th, 1985.
Windows 1.0 would offer a graphical user interface, or G.U.I. to allow easier access to programs and files that through the, at the time, traditional program of MS-DOS.
However, like later versions of the Windows, 1.0 required DOS to run and was greatly integrated with the program.
At the time, the first version of Windows required 256 kilobytes of RAM and either two floppy disks or a hard drive. These were considered high-end requirements in 1985.
Several legacy programs for Windows began with 1.0 including Notepad, Paint, and Calculator.
Windows could not be overlapped in this early version, instead each one showed side-by-side.
Windows 1.0 was supported by Microsoft for sixteen years, and ended at the end of 2001.
It would be followed by Windows 2.0.