Driver models
Windows NT introduced its own driver model, the Windows NT driver model, and is incompatible with older driver frameworks. With Windows 2000, it was replaced by the Windows Driver Model, which was first introduced with Windows 98, but was based on the NT driver model.[1] Windows Vista added native support for the Windows Driver Foundation, which is also available for Windows XP, Windows Server 2003 and to an extent, Windows 2000.
Releases
 | This article or section contains information about scheduled or expected future software. The content may change as the software release approaches and more information becomes available. |  |
| Version | Marketing Name | Editions | Release Date | RTM Build |
|---|---|---|---|---|
| NT 3.1 | Windows NT 3.1 | Workstation (named just Windows NT), Advanced Server | July 27, 1993 | 528 |
| NT 3.5 | Windows NT 3.5 | Workstation, Server | September 21, 1994 | 807 |
| NT 3.51 | Windows NT 3.51 | Workstation, Server | May 30, 1995 | 1057 |
| NT 4.0 | Windows NT 4.0 | Workstation, Server, Server Enterprise Edition, Terminal Server, Embedded | July 29, 1996 | 1381 |
| NT 5.0 | Windows 2000 | Professional, Server, Advanced Server, Datacenter Server | February 17, 2000 | 2195 |
| NT 5.1 | Windows XP | Home, Professional, 64-bit Edition (Itanium), Media Center (original, 2003, 2004 & 2005), Tablet PC (original and 2005), Starter, Embedded, Home N, Professional N | October 25, 2001 | 2600 |
| NT 5.1 | Windows Fundamentals for Legacy PCs | N/A | July 8, 2006 | 2600 |
| NT 5.2 | Windows XP | 64-bit Edition Version 2003 (Itanium)[2] | March 28, 2003 | 3790 |
| NT 5.2 | Windows Server 2003 | Standard, Enterprise, Datacenter, Web, Storage, Small Business Server, Compute Cluster | April 24, 2003 | 3790 |
| NT 5.2 | Windows XP | Professional x64 Edition | April 25, 2005 | 3790 |
| NT 5.2 | Windows Home Server | N/A | July 16, 2007 | 3790 |
| NT 6.0 | Windows Vista | Starter, Home Basic, Home Premium, Business, Enterprise, Ultimate, Home Basic N, Business N | Business: November 30, 2006 Consumer: January 30, 2007 | 6000 6001(SP1) |
| NT 6.0 | Windows Server 2008 | Standard, Enterprise, Datacenter, Web, Storage, Small Business Server | February 27, 2008 | 6001 |
| NT 6.1 | Windows 7 (codenamed Blackcomb, later Vienna) | TBA | H2 2009 | Unknown |
Note: NT 3.1 to 3.51 incorporate Program Manager and File Manager. NT 4.0 to 6.0 replace this with Windows Explorer (including a taskbar and Start menu).
The first release was given version number 3.1 to match the contemporary 16-bit Windows; magazines of that era claimed the number was also used to make that version seem more reliable than a '.0' release. There were also some issues related to Novell IPX protocol licensing, which was apparently limited to 3.1 versions of Windows software.[citation needed]
The NT version number is no longer used for marketing purposes, but is still used internally, and said to reflect the degree of changes to the core of the operating system.[3] The build number is an internal figure used by Microsoft's developers and beta testers.
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