Windows 1.03

Windows 1.03 is a 16-bit graphical operating system developed by Microsoft Corporation and released to the public in August 1986. It runs as a graphical shell on top of an existing MS-DOS installation. Support was officially discontinued on December 31, 2001. Windows 1.03 included additional international enhancements, such as dedicated drivers for European keyboards, and additional screen and printer drivers.

Windows 1.03 offered limited multitasking. Some basic applications included with Windows 1.0 were Calculator, Calendar, Clipboard Viewer, Clock, Notepad, Reversi, Paint, Write, and Cardfile.