You would watch live images sent from closed circuit television (CCTV) cameras so you can spot and prevent crimes, accidents and incidents like traffic jam. CCTV is also used on public transport like buses and trains, in stations and to monitor traffic in a city or on busy roads like motorways.

A Biometric device is a security identification and authentication device. Such devices use automated methods of verifying or recognising the identity of a living person based on a physiological or behavioural characteristic. These characteristics include fingerprints, facial images, Iris prints and voice recognition.

Networking hardware, also known as network equipment or computer networking devices, are physical devices which are required for communication and interaction between devices on a computer network. Specifically, they mediate data in a computer network.