Windows 1.0 was released on November 20, 1985, as the first version of theMicrosoft Windows line. It runs as a graphical, 16-bit multi-tasking shell on top of an existing MS-DOS installation. It provides an environment which can run graphical programs designed for Windows, as well as existing MS-DOS software. For $99, it came with a notepad, calendar, clock, cardfile, terminal application, file manager, a game of Revers, Windows Write, and Windows Paint.
Microsoft had worked with Apple Computer to develop applications for Apple’s January 1984 original Macintosh, the first mass-produced personal computer with a graphical user interface(GUI) that enabled users to see user friendly icons on screen. Windows 1.0 was released on November 20, 1985, as the first version of the Microsoft Windows line.
The development of Windows began after Microsoft founder Bill Gates saw a demonstration at COMDEX 1982 of VisiCorp’s Visi On, a GUI software suite for IBM PC compatible computers. In 1983 Microsoft learned that Apple’s own GUI software—based in part on Xerox PARC technology–was much more sophisticated, and decided that its own product would be different. Microsoft first presented Windows to the public on November 10, 1983. Requiring two floppy disk drives and 192 KB of RAM, Microsoft described the software as a device driver for MS-DOS 2.0. By supporting cooperative multitasking in tiled windows when using well-behaved applications that only used DOS system calls, and permitting non-well-behaved applications to run in a full screen, Windows differed from both Visi On and Apple Computer’s Lisa by immediately offering many applications. Unlike Visi On, Windows developers did not need to use Unix to develop IBM PC applications; Microsoft planned to encourage other companies, including competitors, to develop programs for Windows by not requiring a Microsoft user interface in their applications.
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Windows 1.03 (08-24-86) (5.25)
Windows 1.04 (05-11-1987) (5.25)
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