Referred to as \"microcomputer\
1, the microcomputer is composed of five parts: an arithmetic device, a controller, a memory, an input device and an output device. The memory is divided into internal memory and external memory; Usually we refer to the input device and the output device as peripheral devices; The arithmetic and controller are also called the Central Processing Unit (CPU).
2, the Microcomputer with the corresponding peripherals (such as printers, monitors, disk drives, tape drives, etc.) and other dedicated circuits, power supplies, panels, racks, and sufficient software composed of the System is called the Microcomputer System (is what we usually say computer).