Almost three years ago I wrote this post about Visual Studio version numbers. At that time, Visual Studio 2010 was at Community Technology Preview (CTP) state, not even beta, and some values changed in the Release To Manufacturing (RTM) release. Today I have written this new article for the MZ-Tools Articles Series with updated information and some fix:

INFO: Visual Studio version numbers.
http://www.mztools.com/articles/2011/MZ2011011.aspx

As you can see, version numbers are inconsistent across Visual Studio versions. You may have noticed that even the .NET Framework version has become inconsistent: previously you had .NET Framework 1.0, 1.1, 2.0, 3.0 and 3.5, and the new version is officially named .NET Framework 4, not .NET Framework 4.0.