Image Gallery: Government's 10 Most Powerful Supercomputers
The United States government owns many of the most powerful supercomputers in the world, including six of the top ten. These supercomputers are being used for everything from climate modeling to building spaceships to basic science research.
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Los Alamos National Laboratory's Roadrunner is the second-most powerful supercomputer on the Top500. It's a cluster of IBM BladeCenter servers peaking at 1.38 PFlops. The first supercomputer to break the petaflop barrier, Roadrunner has been used to model the universe's beginnings, research magnetism and lasers, and create an evolutionary tree of HIV.