Windows

1. Windows 3.1 (1992)

2. Windows NT 3.1 (1993)

3. Windows NT 3.5 (1994)

4. Windows NT 3.51 (1995)

5. Windows NT 4.0 (1996)

6. Windows XP — Windows NT 5.1 (2001)

7. Windows XP 64-bit Edition — Windows NT 5.2 (2003)

8. Windows 1.0 (1985)

9. Windows 2.0 (1987)

10. Windows 2.1 (Windows 386, 1987)

11. Windows 3.0 (1990)

12. Windows 2000 — Windows NT 5.0 (2000)

13. Windows Server 2003 — Windows NT 5.2 (2003)

14. Windows Vista — Windows NT 6.0 (2006)