Windows 1

Windows 1

(operating system)
The first incarnation of Microsoft Windows, released in 1985. It took a total of 55 programmer-years to develop, and only allowed tiled windows.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
References in periodicals archive ?
Windows 1.0 was the firstAaAeAeA graphical interface for MS-DOS, the old command line-based operating system Microsoft introduced for IBM PCs in 1981.
Windows 2.0, which launched in 1987, and Windows 3.0, which launched in 1990, made improvements to the very basic (by today's standards) offerings of Windows 1.0.