The Seattle-based Cray may not be a household name but the company has become an essential cog in the world of data processing. The company is currently working with AMD on a US government-backed project to build the world's first exascale supercomputer at Oak Ridge National Laboratory. The system will be capable of a quintillion calculations per second. Last year, Japan tapped Cray to create the world's fastest supercomputer to be used for advanced nuclear fusion research. According to Top500.org, a service that tracks the performance of supercomputers, Cray is responsible for three of the top 10 most powerful systems in the world.