The system consists of 80C196KB/KC single chip microcomputer, 27C64 memory, optical coder and its external decode circuit, motor drive circuit, current - limiting circuit, DC servo motor etc.

本系统由80C196KB／KC单片机、27C64存贮器、光学编码器及外部译码电路、电机驱动电路、限流电路、直流伺服电机等组成。

youdao

Regarding the longevity of storage media many of the products that we use today, hard disk drives, flash memory, optical discs and magnetic tape will react with the ambient environment and gradually lose the data stored on them or disintegrate over time.

FORBES: Storing Information for a Thousand Years

Consumer devices use common digital storage technology such as flash memory, hard disk drives or optical discs.

FORBES: Will You Remember Me When I am Gone: The Persistent Danger of Data Loss

As can be seen, traditional film use is 15% or less with digital technologies such as optical discs, hard disk drives, magnetic tape and flash memory are the bulk of modern recording media.

FORBES: End of the Reel