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; 28 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 the third major release of the Windows NT operating system, developed by Microsoft for the data server and personal workstation markets.^[3] It 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.