Closed-circuit television, also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors.

Card used to enable physical access to buildings and controlled spaces, and it provides access to defense computer networks and systems.

An identity document is any document which may be used to prove a person's identity. If issued standard credit card size form, it is usually called an identity card, or passport card.

Artificial intelligence is believed as a disruptive technology, It can be employed to replace human labors in completing many dangerous tasks.