A closed circuit of video recorder and screens that allows events to be recorded and viewed at a later date. This is a method frequently used in teaching adults, so that participants can learn from viewing the event. Frequently used in tutor...

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...