Windows NT run processes that run on different operating system i.e. Linux, OS/2, and Solaris, because all mentioned operating systems support multi-threading in single process. while in those OS which don't support multi-threading single process (e.g. UNIX) windows NT processes don't run on them.
Windows NT 3.1 only came in two versions, Windows NT 3.1 and Windows NT 3.1 Advanced Server.
No.
There is / was nothing that necessarily stopped Windows NT from being used at home. Significantly fewer consumer-oriented applications, like video games, would run on Windows NT, however.
Windows NT is part of the Microsoft Windows line of operating systems. Microsoft Windows is used to describe Microsoft's flagship OS in general while Windows NT is an outdated OS that used to run on workstations and servers. Windows 2000, XP, Vista, and 7 are all based upon Windows NT.
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.
Windows NT
NT does have backward compatibility. You can use every NT program on every NT based platform. DOS platforms however are completely different.
Windows NT uses protection mechanism called rings provides by the process to implement separation between the user mode and kernel mode.
In Windows NT 4.0, a subsystem is a component that provides a specific interface for applications to interact with the operating system's kernel. Each subsystem allows applications designed for different environments, such as Windows GUI or POSIX, to run on NT by translating their system calls into a format that the kernel can understand. Notably, the Windows NT 4.0 architecture includes multiple subsystems, enabling compatibility with various types of applications, thus enhancing its versatility and functionality.
http://www.ss64.com/nt/
Absolutely nothing.
Yes. WinRAR will even run on older systems, such as Windows 95 or NT 4.