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2. 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. Dome camera in Rotterdam central metro station. 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.

3. List of digital camera brands - Wikipedia

   en.wikipedia.org/wiki/List_of_digital_camera_brands

   Compact digital cameras, bridge digital cameras. Blackmagic Design. Australia. Digital video cameras, pro and consumer. Canon. Japan. Ixus and PowerShot compact digital cameras, Vixia camcorders, EOS M MILC and Digital EOS/Digital Rebel DSLRs. Casio. Japan.

4. 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 ...

5. Mass surveillance in the United States - Wikipedia

   en.wikipedia.org/wiki/Mass_surveillance_in_the...

   The practice of mass surveillance in the United States dates back to wartime monitoring and censorship of international communications from, to, or which passed through the United States. After the First and Second World Wars, mass surveillance continued throughout the Cold War period, via programs such as the Black Chamber and Project SHAMROCK.

6. Closed-circuit television camera - Wikipedia

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

   Vandal dome-style camera. 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.

7. Surveillance - Wikipedia

   en.wikipedia.org/wiki/Surveillance

   Surveillance Camera to support the Washington, DC Police. Surveillance is the monitoring of behavior, many activities, or information for the purpose of information gathering, influencing, managing, or directing. [1] [2] This can include observation from a distance by means of electronic equipment, such as closed-circuit television (CCTV), or ...