This node is for the purpose of displaying the codenames of the various major versions of Windows&trade, if you have any more, please /msg me and I'll add them.
Janus - Windows 3.1 - Released in 1992
Snowball - Windows 3.11 - Released in 1993
Daytona - Windows NT 3.5 - Released in 1994
Cairo - Windows NT 4.0 - Released in 1996
Chicago - Windows 95 - Released in 1996
Memphis - Windows 98 - Released in 1998
Windows NT 5.0 - Windows 2000 - Released in 2000
Millennium - Windows ME - Released in 2000
Whistler - Windows XP - Released in 2001
The current codename for the next proposed version of windows is Longhorn and Blackcomb after that.