Windows Vista Product Map
Source: Microsoft
If you hadn't heard of Windows Vista, Office 2007, .NET Framework 3.0, Longhorn Server and the likes, you might want to take a look at this map to see how it all maps together to be one big eco-system, which you could leaverage on your development projects.
Read the complete post at http://darrensim.com/blogs/techbits/archive/2006/11/18/windows-vista-product-map.aspx