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Sci-Tech Dictionary: Closed-circuit television
(communications) Any application of television that does not involve broadcasting for public viewing; the programs can be seen only on specified receivers connected to the television camera by circuits, which include microwave relays and coaxial cables. Abbreviated CCTV.

Sci-Tech Encyclopedia: Closed-circuit television
Television transmitted to a particular audience at specific locations via coaxial cables, telephone wires, fiber-optic strands, microwave radio systems, or communications satellites, as compared to open-circuit (broadcast) television intended for the general public.

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