Von Neumann's "First Draft of a Report on the EDVAC" is known as the first paper on the modern computation theory, where he compared electric circuits to neuron networks. The idea of conceiving neuron networks as logical circuits was proposed by W. S. McCulloch and W. Pitts, and was called the McCulloch-Pitts Model. This model led von Neumann to develop his automata theory, in which he proposed five models like the cellular model. Through them, he tried to present a unified study of modern computing machines and the human nervous system.