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Windows 1.0 (briefly codenamed Interface Manager) is a 16-bit graphical operating system developed by Microsoft Corporation and released to testers in July, 1985 as Windows 1.0 Premiere Edition. It runs as a graphical shell on top of an existing MS-DOS installation. Support was officially discontinued on December 31, 2001. Windows 1.0's first public release was Windows 1.01, while Windows 1.02 was the first international release.
Windows 1.0 offered limited multitasking. Some basic applications included with Windows 1.0 were Calculator, Calendar, Clipboard Viewer, Clock, Notepad, Reversi, Paint, Write, and Cardfile.
|MS-DOS Minimum/Recommended Specifications|
|Minimum Specifications||Recommended Specifications|
|System||For Compaq and IBM Personal Computers. IBM PS/2 support added in Windows 1.04, but only IBM Windows 1.04 supports PS/2 mice.|
|Operating System||MS-DOS 2.0||Operating System||MS-DOS 3.0|
|RAM||192 KB conventional memory||RAM||512 KB conventional memory|
|Graphics||IBM CGA, IBM EGA, Hercules graphics card or compatibles.|
|Storage||Hard disk installation recommended if running MS-DOS 3.0 or higher, or if the user intends to run multiple programs.|
|Floppy Disk Drive||Two double-sided Floppy Disk Drives are required for Installation. Windows 1.0 designed to be installed to a floppy disk.|