The Cray-2 was a four-processor ECL vector supercomputer made by Cray Research starting in 1985. It was the fastest machine in the world when it was released, replacing the Cray Research X-MP designed by Steve Chen in that spot. The Cray-2 was capable of 1.9 GFLOPS peak performance and was only bumped off of the top spot by the ETA-10G in 1990.
Read more about Cray-2: Initial Design, Uses and Successors, History