Photo taken on June 16, 2013 shows the supercomputer Tianhe-2 developed by China's National University of Defense Technology. The supercomputer Tianhe-2, capable of operating as fast as 33.86 petaflops per second, was ranked on Monday as the world's fastest computing system, according to TOP500, a project ranking the 500 most powerful computer systems in the world. [Photo/Xinhua]