Access control is the selective restriction of access to a designated area, and forms an integral part of the electronic security for the majority of modern companies. Access control points include doors, turnstiles, parking gates and booms, etc., where granting access can be electronically controlled through card or tag readers, and fingerprint readers. Although the enhancement of security to sensitive areas is the main benefit of access control, it can also be used to monitor time and attendance, thereby improving productivity in the workplace.

With advancements in technology, many private clients are also opting for access control to their homes, not only for improved security, but also as a way to simplify their lives. Access control can be combined with other systems to give the homeowner greater control over their security and home automation.