The most expensive computer has been created in Japan. The Japanese government estimates the Earth Simulator’s cost in $400,000,000. Each processor node contains 8 vector processors running at 500MHz with 16GB of shared memory, and the total main memory in the machine is 10 terabytes. The operating system running on the supercomputer is NEC’s UNIX-based OS called “SUPER-UX” which is used on NEC’s SX Series of supercomputers. This expensive computer is used on a wide variety of international projects, most of which are related to atmospheric, climate, and oceanographic simulation.