Most people using NT knew it as version 4. Some folks knew that Windows 2000 was version 5. After that, things got weird: Vista is 6 but Windows 7 is 6.1 and

Most people using NT knew it as version 4. Some folks knew that Windows 2000 was version 5. After that, things got weird: Vista is 6 but Windows 7 is 6.1 and Windows 8 is 6.2: http://msdn.microsoft.com/en-us/library/windows/desktop/ms724832%28v=vs.85%29.aspx http://msdn.microsoft.com/en-us/library/windows/desktop/ms72... Windows 10 will finally (but perhaps temporarily) undo this weirdness, and report itself as version 10, but only to some applications! http://arstechnica.com/information-technology/2014/11/why-windows-10-isnt-version-6-any-more-and-why-it-will-probably-work/ http://arstechnica.com/information-technology/2014/11/why-wi...