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2. Qube (cable television) - Wikipedia

   en.wikipedia.org/wiki/Qube_(cable_television)

   Qube (stylized QUBE) was an experimental two-way, multi-programmed cable television system that played a significant role in the history of American interactive television. It was launched in Columbus, Ohio, on 1 December 1977. [1]

3. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   A taut wire perimeter security system is an independent screen of tensioned tripwires usually mounted on a fence or wall. Alternatively, the screen can be made thicker to avoid the need for a supporting chain-wire fence. These systems are designed to detect any physical attempt to penetrate the barrier.

4. C-Bus (protocol) - Wikipedia

   en.wikipedia.org/wiki/C-Bus_(protocol)

   C-Bus is a communications protocol based on a seven-layer OSI model for home and building automation that can handle cable lengths up to 1000 metres using Cat-5 cable. It is used in Australia, New Zealand, Asia, the Middle East, Russia, United States, South Africa, the UK and, other parts of Europe including Greece and Romania.

5. Cologix - Wikipedia

   en.wikipedia.org/wiki/Cologix

   Cologix acquired DataCenter.BZ in February 2014, [4] procuring 86,000 square feet [5] across two data center facilities at 555 Scherers Court in Columbus, Ohio. The site is located at the intersection of two trunks of nationwide fiber optic network that carries most Internet transmissions. [6]

6. Closed-circuit television - Wikipedia

   en.wikipedia.org/wiki/Closed-circuit_television

   CCTV monitoring at the Central Police Control Station, Munich, Germany, in 1973 Desk in one of the regional control-rooms of the National Police in the Netherlands in 2017 CCTV control-room monitor wall for 176 open-street cameras in 2017. An early mechanical CCTV system was developed in June 1927 by Russian physicist Leon Theremin. [9]

7. Home security - Wikipedia

   en.wikipedia.org/wiki/Home_security

   Door and window sensors are also implemented in most home security systems. One part of the system is installed on the door or window itself while the other part is installed on the frame of the door or window. The two part system connects securely when a door or window is closed, creating a security circuit. [5]