CCTV 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 security in medium-to high-secure areas and installations.
• Observing behavior of incarcerated inmates and potentially dangerous patients in medical facilities.
• Traffic monitoring.
• Overseeing locations that would be hazardous to a human, for example, highly radioactive or toxic industrial environments.
• Building and grounds security.
• Obtaining a visual record of activities in situations where it is necessary to maintain proper security or access controls