10. The World's Fastest Computer

On May 26, at 3:30 in the morning, a $133 million supercomputer nicknamed Roadrunner broke the long-sought-after petaflop barrier: 1 quadrillion calculations per second. Built by IBM for Los Alamos National Laboratory, Roadrunner will be used primarily to simulate the effects of aging on nuclear weapons. Next up: the exaflop barrier.

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