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2. Sliding door operator - Wikipedia

   en.wikipedia.org/wiki/Sliding_door_operator

   A door operator may be triggered in various ways: Approach Sensor (such as a radar sensor) - the door opens when a user approaches it. Pushbutton - the door opens when a user presses a button. Access control - the door opens when an access control system determines the user is authorized to go through. Automatically (in the case of elevators).

3. Swing-door operator - Wikipedia

   en.wikipedia.org/wiki/Swing-door_operator

   Pushbutton – the door opens when a user presses a button. Push-&-go – the door opens fully when the user begins opening it. Access control – the door opens when an access control system determines the user is authorized to go through. A trigger from any of the above requests that the door be opened (or reopened if it was closing).

4. Automatic door - Wikipedia

   en.wikipedia.org/wiki/Automatic_door

   An automatic door, also known as an auto door, is a door that opens automatically, without the need for human intervention or usually upon sensing the approach of a person. A person can be detected by microwave pulses, infrared sensors , or pressure-sensing pads.

5. Access control - Wikipedia

   en.wikipedia.org/wiki/Access_control

   Components of an access control system include: An access control panel (also known as a controller) An access-controlled entry, such as a door, turnstile, parking gate, elevator, or other physical barrier; A reader installed near the entry. (In cases where the exit is also controlled, a second reader is used on the opposite side of the entry.)

6. Remote keyless system - Wikipedia

   en.wikipedia.org/wiki/Remote_keyless_system

   A remote keyless system (RKS), also known as remote keyless entry (RKE) or remote central locking, is an electronic lock that controls access to a building or vehicle by using an electronic remote control (activated by a handheld device or automatically by proximity). [1]

7. Smart lock - Wikipedia

   en.wikipedia.org/wiki/Smart_lock

   A smart lock is an electromechanical lock that is designed to perform locking and unlocking operations on a door when it receives a prompt via an electronic keypad, biometric sensor, access card, Bluetooth, or Wi-FI from a registered mobile device. These locks are called smart locks because they use advanced technology and Internet ...