From June 65438 to June 0946, Professor von Neumann, a Hungarian-born American scientist, published a paper on the logical structure of electronic computer equipment and designed the first "stored program" computer EDVAC, that is, the electronic discrete variable automatic computer. This kind of computer laid the foundation of modern computer architecture and became the "von Neumann architecture".

(1) uses binary 0 and 1 to directly simulate the on-off state of the switch circuit, which is used to represent data or computer instructions.

(2) store the instructions in the computer and execute them automatically.

(3) Computer hardware consists of five parts: controller, arithmetic unit, memory, input device and output device.