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pfff *420* … how … collegiate …
In 2009 it was [documented](http://arstechnica.com/security/2009/11/sony-still-subsidizing-us-supercomputer-efforts/) that the [DoD](http://scitech.blogs.cnn.com/2009/12/09/military-purchases-2200-ps3s/) bought some to make a 2200 node cluster for an unspecified project.
In 2010 the US Air Force Research Lab built a [1,760](http://phys.org/news/2010-12-air-playstation-3s-supercomputer.html) node named “Condor Cluster”
It wasn’t long after this Sony tweaked their firmware to remove the “install other OS” option.