Windows NT 3.1 only came in two versions, Windows NT 3.1 and Windows NT 3.1 Advanced Server.
NTVDM is a system component of all the IA-32 Windows NT editions. It is part of the Windows virtual machine that allows execution of 16-bit Windows and DOS applications.
Windows 1.0, 2.0, 3.0, 3.1, NT 3.1, NT 3.5, NT 3.51, and Windows NT 4.Windows 1.0, 2.0, 3.0, 3.1, NT 3.1, NT 3.5, NT 3.51, and Windows NT 4.
NT does have backward compatibility. You can use every NT program on every NT based platform. DOS platforms however are completely different.
To function as a server a computer must be running as a WINDOWS based server i.e windows 2000, windows NT, windows 2k3, windows 2k8 editions of server installed on computer the server could be Linux based as well.
Absolutely nothing.
Windows NT 4.0
Windows NT was created on 1993-07-27.
Windows NT came first. NT 4.0 came to manufacturing in 1996, and Win 2000 was released to retail in February of 2000. [Windows 2000 is also known as Windows NT 5.0.]
New Technology
Windows NT (new technology) added the HAL or Hardware Abstraction Layer to prevent direct interaction between hardware and software.
Windows 95 (partial, via USB add-on) Windows 98 Windows ME Windows NT 3.1 Windows NT 3.5 Windows NT 3.51 Window NT 4 Windows 2000 Windows XP Windows Server 2003 Windows Vista Windows Server 2008
As normal Windows. 2000, XP, Vista, and 7 are all technically Windows NT