First version of Microsoft Windows, Windows 1.0 was shipped on November 20, 1985. This was two years after the initial announcement made by Microsoft about their new operating system in 1983.
Microsoft initially considered to call the operating system as “Interface Manager” as the name for the new OS, but later the name “Windows” was decided as it best described the boxes or computing “windows” that are fundamental to the new operating system.
The key attraction in the new product was that rather than typing MS‑DOS commands, you could just move a mouse to point and click your way through screens, or “windows.”
Microsoft listed as features of the product as ;
There are drop-down menus, scroll bars, icons, and dialog boxes that make programs easier to learn and use. You’re able to switch among several programs without having to quit and restart each one. Windows 1.0 ships with several programs, including MS‑DOS file management, Paint, Windows Writer, Notepad, Calculator, and a calendar, card file, and clock to help you manage day-to-day activities. There’s even a game—Reversi.
Most interesting fact is the memory requirements. Windows 1.0 required a minimum of 256 kilobytes (KB), two double-sided floppy disk drives, and a graphics adapter card. A hard disk and 512 KB memory is recommended for running multiple programs or when using DOS 3.0 or higher.
Source : Microsoft
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