The machine for solving systems of linear algebraic equations was recognized as the first working prototype of a specialized computer created by John Atanasoff. Inventive and unique solutions have been developed in the device. Storing numbers for use in machine calculations was a massive problem at the time. Atanasoff used capacitors to store the electric charge for his project, which was able to represent numbers in the form of logical zeros and ones. The capacitors were mounted on rotary bakelite cylinders with metal strips on the outer surface. Each cylinder could store thirty binary numbers that were read from metal belts at cylinder rotation.