How much Open Source is an Application?

With the spreading of Open Source libraries it's possible to build very powerful application both commercial and open source. While I was looking at the new features of MATLAB 7 I was thinking about how much open source is in that, and I've discovered that's a LOT!

So I've decided to analyze some applications around, both commercial and not, to discover the common used components and present these raltion by using a graph

You can find the full article and more details here