Simon (computer)
Simon was a relay-based electromechanical computer, described by Edmund Berkeley in a series of thirteen construction articles in Radio-Electronics magazine, from October 1950. Intended for the educational purpose of demonstrating the concept of a digital computer, it could not be used for any significant practical computation since it handled only two-bit numbers (values 0 through 3) and had only 32 bits (16 two-bit registers) of memory.