fastest computer

After researching, I found that the fastest computer in the world is Japan's K computer built by Fujitsu in Kobe, Japan. Cray, IBM, and Hewlett are some of many that use supercomputers similar to the K computer. 

The LINPACK benchmark program, running on the part of the system that employs 68,544 CPUs installed on the K computer being configured, recorded the world's top performance of 8.162 petaflops. When configuration of the K computer is complete in 2012, it is designed to achieve LINPACK performance of 10 petaflops. It will be widely used in a variety of computational science fields where it is expected to contribute to the generation of world-class research results.