Technology Report - Computer in China Tops List of World's Most Powerful

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Tianhe-2 supercomputer has been rated number one on the Top500, a of the world's most powerful computers. Experts measured the supercomputer's performance 33.86 petaflops, or quadrillions of operations per second. China's National University Defense Technology developed the supercomputer, which runs twice as fast as number two rated Titan supercomputer. That machine belongs to the US.. Oakridge National Laboratory in the outhern state of Tennessee. Tianhe-2 and are part of the race to make supercomputers faster and more . So what is a supercomputer? A basic personal computer has one at the center of its operations. This Central Processing Unit, or , carries out a set of commands as part of a predesigned first supercomputers had a few more CPUs. The number grew as became cheaper and faster. Andrew Grimshaw is a computer science professor the University of Virginia. He says many supercomputers today are called machines. Instead of one CPU, they have thousands. These parallel machines made up of many individual computers called nodes. They are positioned one block. They use a lot of power, create a lot heat, and require huge cooling systems. They also use programs different the ones used by ordinary computers. Professor Grimshaw says anyone with resources can build a supercomputer to solve problems that require millions mathematical calculations. For VOA Learning English, I'm Carolyn

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