CCTV (closed-circuit television) is a TV system in which signals are not publicly distributed but are monitored, primarily for surveillance and security purposes.
CCTV is commonly used for a variety of purposes, including: Maintaining perimeter, Observing behavior of potentially dangerous patients in medical facilities, Traffic monitoring, Overseeing locations that would be hazardous to a human, Building and grounds security and Obtaining a visual record of activities in situations where it is necessary to maintain proper security.