CCTV or Closed Circuit Television refers to a visible or covert video system intended for only a limited number of viewers and is not a broadcast TV signals to the public; it transmits images or recordings to a limited number of monitors.
In Closed Circuit TV (CCTV), the picture is viewed or recorded, but not broadcast. It was initially developed as a means of security for banks and casinos; however, today it has been developed to the point where it is simple and inexpensive enough to be used with Home Security Systems, and for everyday surveillance.
A CCTV system is not only applied to the security and surveillance purpose but also to the other fields like laboratories in schools or in private companies, even to production lines in factories. As the application of CCTV system increased, the CCTV industry has developed variety of CCTV equipment and recording mediums to suit many diverse applications. The most recent developments being in IP and Cloud based systems.