Von Neumann architecture
Many of the computers were based on the "First Draft of a Report on the EDVAC" report published in 1945. In what became known as the Von Neumann architecture, a central control unit and arithmetic logic unit (ALU, which he called the central arithmetic part) were combined with computer memory and input and output functions to form a stored program computer. The "Report" presented a general organization and theoretical model of the computer, however, not the implementation of that model.