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  2. Closed-circuit television camera - Wikipedia

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

    These cameras do not require a video capture card because they work using a digital signal which can be saved directly to a computer. The signal is compressed 5:1, but DVD quality can be achieved with more compression (MPEG-2 is standard for DVD-video, and has a higher compression ratio than 5:1, with a slightly lower video quality than 5:1 at best, and is adjustable for the amount of space to ...

  3. Closed-circuit television - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television

    Some organizations also use CCTV to monitor the actions of workers in a workplace. [72] Dome camera in Rotterdam central metro station. Many sporting events in the United States use CCTV inside the venue, either to display on the stadium or arena's scoreboard or in the concourse or restroom areas to allow people to view action outside the ...

  4. Beware of the dog - Wikipedia

    en.wikipedia.org/wiki/Beware_of_the_dog

    Under English law, placing such a sign does not relieve the owner of responsibility for any harm which may come to people attacked by the dog. [11] [12] Where a company employs the services of a guard dog, Section 1(3) of the Guard Dogs Act 1975 requires "a notice containing a warning that a guard dog is present is clearly exhibited at each entrance to the premises."

  5. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary ( theft ) or property damage , as well as against intruders.

  6. Wireless security camera - Wikipedia

    en.wikipedia.org/wiki/Wireless_security_camera

    Analog wireless is found in three frequencies: 900 MHz, 2.4 GHz, and 5.8 GHz. Currently, the majority of wireless security cameras operate on the 2.4 GHz frequency. Most household routers, cordless phones, video game controllers, and microwaves operate on the 2.4 GHz frequency and may cause interference with a wireless security camera.

  7. Fears that drones could drop guns into prisons - AOL

    www.aol.com/fears-drones-could-drop-guns...

    Mr Taylor said gangs were now using drones carrying payloads of up to 3lb (1.3kg) of contraband into prison. Inmates had organised the delivery of "Zombie knives" and firearms could follow.

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