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  2. Surveillance - Wikipedia

    en.wikipedia.org/wiki/Surveillance

    Surveillance is used by citizens, for instance for protecting their neighborhoods. It is widely used by governments for intelligence gathering, including espionage, prevention of crime, the protection of a process, person, group or object, or the investigation of crime. It is also used by criminal organizations to plan and commit crimes, and by ...

  3. Closed-circuit television camera - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television...

    A closed-circuit television camera is a type of surveillance camera that transmits video signals to a specific set of monitors or video recording devices, rather than broadcasting the video over public airwaves. The term "closed-circuit television" indicates that the video feed is only accessible to a limited number of people or devices with ...

  4. List of films featuring surveillance - Wikipedia

    en.wikipedia.org/wiki/List_of_films_featuring...

    In the future, the protagonist has a camera implanted in his brain and is enlisted to probe a dying woman's subconscious. [15] Déjà Vu: 2006: A detective tries to save a woman's life by utilizing advanced surveillance equipment. Demolition Man: 1993: The science fiction film depicts a 2032 "San Angeles" where everyone's behavior is under ...

  5. Closed-circuit television - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television

    Surveillance cameras on the corner of a building. Surveillance camera in a residential community. Closed-circuit television (CCTV), also known as video surveillance, [ 1 ][ 2 ] is the use of closed-circuit television cameras to transmit a signal to a specific place, on a limited set of monitors.

  6. Wireless security camera - Wikipedia

    en.wikipedia.org/wiki/Wireless_security_camera

    Wireless security cameras are closed-circuit television (CCTV) cameras that transmit a video and audio signal to a wireless receiver through a radio band. Many wireless security cameras require at least one cable or wire for power; "wireless" refers to the transmission of video/audio. However, some wireless security cameras are battery-powered ...

  7. IP camera - Wikipedia

    en.wikipedia.org/wiki/IP_camera

    An Internet Protocol camera, or IP camera, is a type of digital video camera that receives control data and sends image data via an IP network.They are commonly used for surveillance, but, unlike analog closed-circuit television (CCTV) cameras, they require no local recording device, only a local area network.

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