Glossary
Valet Key-
(n.) An automotive key that operates all locks except storage compartments, on a vehicle where there is also a master key to operate all locks.
VATS-
(abb.) Vehicle Anti-Theft System
VATS Interrogator-
(n.) A device which determines the resistor value required to complete the ignition circuit. It also reads the value of the resistor in a VATS key.
Vault-
(n.) A secure room in which objects of value are stored.
VD-
(abb.) Vertical down
Vehicle Anti-Theft System-
(n.) An electronic system in some General Motors vehicles which uses a resistor pellet of varying value imbedded in a mechanical ignition key.
Vertical Down-
(adj.) Of or pertaining to a mounting orientation of a safe or vault lock such that the bolt projects downward.
Vertical Group Master Key-
(n.) The two-pin master key for all combinations listed in all blocks in a line down a page in the standard progression format.
Vertical Rod Exit Device-
(n.) An exit device with bolts typically at the top and bottom of a door connected to a central mechanism by rods.
Vertical Up-
(adj.) Of or pertaining to a mounting orientation of a safe or vault lock such that the bolt projects upward.
VGM-
(abb.) Vertical Group Master Key.
Virtual Keyway-
(n.) A secondary locking mechanism combination used as a method of discriminating between suppliers for key control.
Vise Arm-
(n.) The movable jaw of a key machine vise.
Vise Nut-
(n.) A nut, with an external design to facilitate use without tools, that works in conjunction with the vise stud to tighten the vise on a key machine.
Vise Stud-
(n.) A threaded post mounted to the carriage of a key machine to provide a means of tightening the vise.
Visual Key Control-
(n.) A specification that all keys and the visible portion of the front of all lock cylinders be stamped with standard keying symbols.
VKC-
(abb.) Visual Key Control
VU-
(abb.) Vertical Up
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Emergency Service 
