Used “in production” at NCSA since May, 1993, the CM-5, a message-passing, distributed memory, massively parallel machine, is well-suited for problems that can be broken into many pieces to be worked on simultaneously. Thinking Machine’s Connection Machine 5 (CM-5) was the first large scale “massively parallel” computing system to be employed by the MetaCenter and is still one of the most popular systems for running some of most computationally intensive Grand Challenge computations.