Windows NT 3.5x

Windows NT 3.5
Windows NT 3.5 was released on 1994-09-21. It is the first version to acquire the edition names of 'Workstation' and 'Server'. This version of Windows NT cannot be installed in a proccessor newer than the original Pentium.

Windows NT 3.51
Windows NT 3.51 is the first release of Windows NT with support for the PowerPC architecture. PCMCIA support, NTFS file compression, replaceable GINA and 3D support in OpenGL.