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Millions of Windows XP disks secretly included Microsoft's failed search assistant to keep pirates at bay — "Bob was actually more useful dead than alive"

Before Windows introduced its modern GUI system, Microsoft was well-known for its iconic command-line operating system, MS-DOS (Microsoft Disk Operating System) throughout the 1980s and early 1990s.
PC World

Microsoft Windows hits 40 years old: A visual walk down memory lane

On November 20th, 1985, a then not-so-big company called Microsoft announced that Windows was commercially available. Read the full story of the Microsoft operating system below. Windows 1 to 11: The ...