This line started with the release of Windows NT 3.1 in 1993, and with the release of Windows XP in October 2001 was introduced to general users-replacing Windows 9x with a completely different, much more sophisticated operating system.
This line started with the release of Windows NT 3.1 in 1993, and still continues with Windows 10. The release of Windows XP in October 2001 brought the NT kernel version of Windows to general users, replacing Windows 9x with a completely different operating system.