Judges announce the world's fastest supercomputer during the supercomputers awarding ceremony in New Orleans, the United States, on Nov.18, 2014. For the fourth consecutive time, Tianhe-2, developed by China's National University of Defense Technology, has retained the top spot as the world's fastest supercomputer, according to a biannual Top500 list of supercomputers released here on Monday. (Xinhua/Yang Lei)
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