The J–Machine (Jellybean-Machine) was a parallel computer designed by the MIT Concurrent VLSI Architecture group in conjunction with the Intel Corporation.
The machine used "jellybean" parts—cheap and multitudinous commodity parts, each with a processor, memory, and a fast communication interface—and a novel network interface to implement fine grained parallel programs.
[2] The philosophy of the work was "processors are cheap and memory is expensive," the J in the project's title standing for jellybean which are small cheap candies.
In order to make use of large numbers of processors, the machine featured a novel network interface using message passing.
[4] Three 1024-node J-machine systems have been built and are kept at MIT, Caltech and Argonne National Laboratory.