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  The First IBM had a disk operating system
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  The first home computer with a GUI, graphical user interface.
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  The more affordable home computer with a GUI.
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  Microsoft begins the friendly war with Apple.
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  IBM announces its new Personal System/2 computers, with VGA 256-color graphics, Micro Channel Architecture, Operating System/2, and 1.44 MB 3.5-inch floppy disk drive. No Month Or Date
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  Apple Computer ships the Macintosh Portable. NO Month or date
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  Apple Computer introduces the Macintosh PowerBook series No Month or Date
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  FreeBSD, NetBSD and Windows NT 3.1 came up during 1993.
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  Windows 95 integrated Microsoft's formerly separate MS-DOS and Windows products. It featured significant improvements over its predecessor, Windows 3.1, most notably in the graphical user interface (GUI) and in its relatively simplified "plug-n-play" features.
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  Windows NT 4.0 is a preemptive, graphical and business-oriented operating system designed to work with either uniprocessor or symmetric multi-processor computers.
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  1998 witnessed the release of Windows 98 as well of Solaris 7
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  Windows 2000, which hit the markets in 2000, was the first Windows server operating system to drop the ‘NT’ suffixed to its name.
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  Windows XP was launched and soon gained a wide popularity. Windows XP 64-bit edition followed in 2002.
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  My birthday
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  Windows XP Service Pack 2 was released in 2004.
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  Windows Vista Hit the Markets
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  Windows Vista Service Pack 1 and Windows Server 2008 came up in 2008. It was also during this very year that Windows XP Service Pack 3 was released.
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  2003 witnessed the launch of the Windows 2003 Server as also the release of Red Hat Enterprise Linux 3.