The Raspberry Pi family of single board computers transformed education and has become one of the drivers of the Internet of Thinks revolution. These boards are low-cost, well-featured, and easily available. So what do you get when you take a bunch of Raspberry Pi boards and wire them together? An incredibly cheap and surprisingly high performance parallel computing system that’s not only valuable in education but can also solve some useful, real world problems.
In my case I am in the process using my cluster into a Turing Bombe to break the Kriegsmarine four rotor Enigma M4 machine.