The use of video cameras to transmit a signal to a specific place, on a limited set of monitors. Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas such as offices, homes, banks, casinos, airports, military installations, and convenience stores.
Access control is the selective restriction of access to a place or other resource. There are three types of authenticating a password, pass-phrase or PIN, smart card (proximity / Mifare) and biometric measurement (fingerprint)
The system that designed to detect intrusion – unauthorized entry – into a building or area. Normally are used in residential, commercial, industrial, and military properties for protection against burglary (theft) or property damage, as well as personal protection against intruders. Prisons also use security systems for control of inmates.
Some alarm systems serve a single purpose of burglary protection; combination systems provide both fire and intrusion protection. Intrusion alarm systems may also be combined with closed-circuit television surveillance systems to automatically record the activities of intruders, and may interface to access control systems for electrically locked doors. Systems range from small, self-contained noisemakers, to complicated, multi-area systems with computer monitoring and control.