voila le lien :The #1 supercomputer in the world, the IBM Roadrunner, produced at a cost of nearly $100 million dollars, runs Fedora. IBM has been working on and contributing to Fedora, using it as a prototype for the new cell architecture that leads to this supercomputer.
http://osnews.com/story/20054/_1_Supercomputer_in_the_World_Runs_Fedora