IBM Windows 1.04

IBM Windows 1.04 is a 16-bit graphical operating system developed by IBM and released to the public on May 27 1987. It runs as a graphical shell on top of an existing MS-DOS installation. This OEM release of Windows 1.04 added VGA graphics support, PS/2 mouse support, MCGA support, and support for the 8514/A display driver. It was released on three 720 KB 3.5" floppy disks.