Microsoft Windows NT History - Evolution of Microsoft Windows operating system

Microsoft Windows NT History  - Evolution of Microsoft Windows operating system

Windows NT is a family of operating systems produced by Microsoft, the first version of which was released in July 1993. It is a processor-independent, multiprocessing, and multi-user operating system. The first version of Windows NT was Windows NT 3.1 and was produced for workstations and server computers. 

Initial release date: July 1993
Platforms: IA-32, x86-64, ARM and Itanium (and historically DEC Alpha, MIPS, and PowerPC)
Latest release: 1803
Developer: Microsoft

Windows NT History

In November 1988, a new development team within Microsoft (which includes the former Digital Equipment Corporation developers Dave Cutler and Mark Lucovsky) began working on a revamped version of IBM and Microsoft OS / 2 operating system known as "NT OS / 2". NT OS / 2 was intended to be a secure, multi-user operating system with POSIX support and a modular, portable core with preventive multitasking and support for multiple processor architectures. 

However, after the successful release of Windows 3.0, the NT development team decided to rework the project to use an extended 32-bit port of the Windows API known as Win32 instead of OS / 2. Win32 maintains a structure similar to the Windows APIs (which allow existing Windows applications to be easily ported to the platform), 

but also supported the capabilities of the existing NT kernel. After approval by Microsoft staff, the development continued on what was now Windows NT, the first 32-bit version of Windows. However, IBM opposed the changes, and ultimately continued the development of OS / 2 on its own.

The first version of the resulting operating system, Windows NT 3.1 (named to associate it with Windows 3.1) was released in July 1993, with versions for desktop workstations and servers. Windows NT 3.5 was released in September 1994, focusing on performance improvements and support for Novell's NetWare, and was followed by Windows NT 3.51 in May 1995, which included additional enhancements and support for the PowerPC architecture.

Windows NT 4.0 was released in June 1996, introducing the redesigned Windows 95a interface to the NT series. On February 17, 2000, Microsoft released Windows 2000, a successor to NT 4.0. The Windows NT name was dropped at this time in order to put a greater focus on the Windows brand.

From Microsoft:
Windows NT 4.0 Service Pack 6a (SP6a) resolves the SP6 issue with Lotus Notes and other Winsock based applications and provides the latest updates to Microsoft Windows NT Workstation 4.0 and Windows NT Server 4.0 (including Enterprise Edition). Windows NT 4.0 SP6a contains the known the Year 2000 updates for Windows NT 4.0.
 Windows NT History

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Evolution of Windows Operating System
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