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 relies on strategic placement of cameras and private observation of the camera's input on monitors.
Though CCTV solutions have been in use for decades, new systems are streets ahead of their forebears in terms of effectiveness and affordability. Many cameras capture high-resolution images to allow user to easily identify trespassers, and may even include full motion control. Consequently, a CCTV solution may be engineered to fit any budget, as camera type and DVR memory requirements may be dictated by need as well as resources