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scottie said:
@ nightdragon

Good question about the name

*several minutes of fascinated clicking later*

I believe 3.0/3.1 are counted as the first version, because Windows 1 and 2 are not so much operating systems as GUI add ons for MS-DOS

http://en.wikipedia.org/wiki/Windows_1.0

 

 All the 9X windows are shells on top of MS-DOS... Windows had two lines for a while... there was windows 3.0 and then Windows 3.11 for workgroups that started the NT lineup that ended with Windows 2000 Professional.  With XP the 9X and NT lineup were combined into a single product.  The compatability problems with Vista and XP are very simple, but impossible to fix... a simple version number change from Windows 5.0 to Windows 6.0... Windows 7 will still be Windows 6.X, but that is just to keep from breaking compatibility.