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A US military supercomputer built with Sony PlayStation parts is now the world's fastest computer. The IBM machine, affectionately dubbed "The Roadrunner," is more than two times as fast as the previous supercomputer holding processing records for calculation speeds; the Roadrunner is capable of carrying out 1.026 quadrillion calculations per second.

The project, which cost IBM $133 million, will be used to monitor nuclear weapons as well as study climate change.