CPU card is also called smart card. The integrated circuit in the card contains microprocessor CPU, memory unit (including RAM, FLASH, EEPROM) and chip operating system COS. The CPU card equipped with COS is equivalent to a microcomputer. It not only has the function of data storage, but also has the function of command processing and data security protection. At present, it is widely used in finance, insurance, traffic police, government and other fields.
