Closed Circuit Television (CCTV) is the use of video
cameras to transmit signal to a specific, limited set of monitors.
It differs from broadcast television in that the signal is not
openly transmitted, though it may employ point to point wireless
links. CCTV is often used for surveillance in
areas which need monitoring, such as banks, casinos, airports,
military installations and convenience stores. Increasing use
of CCTV in public places has caused debate over
public surveillance versus privacy. In industrial plants, CCTV
equipment may be used to observe parts of a process that are remote
from a control room, or where the environment is not comfortable
for humans. CCTV systems may operate continuously
or only as required to monitor a particular event.