| Product Name | Internal Version Number | Release Date |
|---|---|---|
| Windows NT 3.1 | 3.1 | July 1993 |
| Windows NT 3.5 | 3.5 | September 1994 |
| Windows NT 3.51 | 3.51 | May 1995 |
| Windows NT 4.0 | 4.0 | July 1996 |
| Windows 2000 | 5.0 | December 1999 |
| Windows XP | 5.1 | August 2001 |
| Windows Server 2003 | 5.2 | March 2003 |
Hmm.. Interesting..
Stay tuned.. 