Blue Gene is a line of IBM supercomputers, designed to handle computationally intensive tasks. The first Blue Gene system, Blue Gene/L, was built in 2004 and was the fifth most powerful supercomputer in the world at the time. The most recent model, Blue Gene/Q, is capable of performing more than one quadrillion calculations per second. Blue Gene systems are used by government agencies and research institutions around the world for applications such as molecular modeling, climate modeling, and computational fluid dynamics.