Windows NT 5.0 (Windows 2000 Alpha and Beta)

Windows NT 5.0 was an early working title for the alpha and early beta versions of Windows 2000.

Alpha and beta versions
Windows NT 5.0 was released as an alpha version in 1996, a beta 1 version in 1997, beta 2 version in 1998, and beta 3 version in 1999.It Was an upgrade of windows NT 4.0

Versions

 * Workstation
 * Server