Windows 1.0

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.

Minimum Specifications

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
CPU	8088	CPU	80286
RAM	192 KB conventional memory	RAM	512 KB conventional memory
Graphics	IBM CGA, IBM EGA, Hercules graphics card or compatibles.
Storage		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.