Access control systems are used for the security of the valuable assets. These electronic systems are used to exert control over who all can interact with a resource. These electronic systems offer a wide range of technical solutions, which allow the free access of valuable business resources and data to authorized people while denying access to unauthorized individuals. These systems perfectly complement video surveillance, fire systems, burglar systems and other security systems.Access control systems are widely used in offices, research laboratories, hospitals, retail sector, public buildings, schools and colleges. Various technologies used in these electronic systems are proximity, biometrics, magnetic stripe, bar code and Wiegand. http://amplify.com/u/a1jill