What does the acronym CCTV stand for?

The acronym CCTV stands for Closed-Circuit Television. This term is used to describe a television system in which signals are not publicly distributed but are monitored, primarily for surveillance and security purposes. Unlike broadcast television, where signals are transmitted over the air and can be received by anyone with a suitable receiver, closed-circuit television is a secure system that confines its signal to specific locations, which is crucial for effective monitoring and preventing unauthorized access. This characteristic makes it widely used in various applications, including public spaces, businesses, and private properties, to enhance security by deterring crime and providing evidence in case of incidents. The other options do not accurately represent the function or structure of CCTV systems, leading to their incorrectness.