UL listed

adj. listed in a directory as having passed specific Underwriters Laboratories testing

VATS

abb. Vehicle Anti Theft System

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

VU

abb. vertical up

Warnock Hersey

n. an independent testing laboratory

warded

adj. having one or more wards

wheel pack

n. an assembly of combination wheels

wheel puller

n. a tool used to remove the steering wheel from a column

window bug

n. an alarm system component designed to detect breaking glass

yoke

n. a component designed to secure cylinders or turn disks in both sides of a mortise lock by means of a single set screw