UV

UL, Underwriters' Laboratories
An American safety-testing organization. Many Cole Hersee switches are UL-rated.See CSA in Canada, and CE in Europe.
http://www.ul.com/welcome.html

VIN (Vehicle Identification Number)
Assigned by the manufacturer, this number is unique to each vehicle and appears on the vehicle's registration and title.

V DC
Volts of direct current, as opposed to V AC.

VOLT V
The unit of voltage or potential difference.
One volt is the difference of potential between two points of an electrical conductor when a current of 1 ampere flowing between those points dissipates a power of 1 watt.
See Ohm's Law

It is named after the Italian physicist Count Alessandro Giuseppe Anastasio Volta (1745-1827).
More on Volta

VOLTAGE
Electrical pressure, the force that causes current to flow through a conductor. Voltage must be expressed as a difference of potential between two points since it is a relational term. Connecting both voltmeter leads to the same point will show no voltage present although the voltage between that point and ground may be thousands of volts.
Calculations often involve Ohm's Law