Ultra High Frequency - This refers to frequencies between 300 and 3000 MHz, which used to include analog TV channels 14-69.
Un-fused Wire - Any section of wire between the power supply and a load that does not include the protection of a fuse or circuit breaker.
Uni-Body Chassis - A vehicle chassis design where the frame and main body cavity are integrated into a single structure.
Universal Product Code (UPC) - Also known as “bar code.” Numbers printed on product package that can be electronically scanned for information such as brand, manufacturer and price.
Upper Midrange - The range of audio frequencies between 2 kHz and 4 kHz that when boosted, can increase the sense of presence while responsible for the attack on percussive and rhythm instruments. If boosted too much around the 3 kHz range it can cause listening fatigue.
Unit - a quantity chosen as a standard in terms of which other quantities may be expressed.
UV - Refer to Ultra Violet