Windows NT 3.51

Windows NT 3.51

Version of the Windows NT operating system
Developer	Microsoft
Source model	Closed source
General availability	May 30, 1995; 29 years ago (1995-05-30)[1]
Latest release	3.51 (Build 1057: Service Pack 5) / September 19, 1996; 27 years ago (1996-09-19)[1]
Marketing target	Business and Server
Platforms	IA-32, Alpha, MIPS, PowerPC
Kernel type	Hybrid
Userland	Windows API, NTVDM, OS/2 1.x, POSIX.1
License	Commercial proprietary software
Preceded by	Windows NT 3.5 (1994)
Succeeded by	Windows NT 4.0 (1996)
Support status
Server	Mainstream support ended on September 30, 2000[2] Extended support ended on September 30, 2002[2]
Workstation	Mainstream support ended on December 31, 2000[2] Extended support ended on December 31, 2001[2]

Windows NT 3.51 is a major release of the Windows NT operating system developed by Microsoft and oriented towards businesses. It is the third version of Windows NT and was released on May 30, 1995, eight months following the release of Windows NT 3.5. The most significant enhancement offered in this release was that it provides client/server support for inter-operating with Windows 95, which was released almost three months after NT 3.51. Windows NT 4.0 became its successor a year later. Mainstream support for Windows NT 3.51 Workstation ended on December 31, 2000,^[2] and extended support ended on December 31, 2001,^[2] while Windows NT 3.51 Server mainstream support ended on September 30, 2000,^[2] followed by extended support on September 30, 2002.^[2] Both editions were succeeded by Windows NT 4.0 Workstation and Windows NT 4.0 Server, respectively.