UDP - User Datagram Protocol.
UHF - Ultra High Frequency. Operates at
300 to 3000 megacycles.
Ultracapacitor - A battery like device
that stores and releases energy quickly. Soon to be in electric cars that can
travel up to 500 miles and recharge in 5 minutes, so claims EEstors Technology.
URL - Uniform Resource Locator.
UPS - Uninterruptible Power Supply. In a
nutshell, a surge protector with a battery that gives you a small amount of time
to shut the computer down after a power failure. There are some expensive
industrial use UPS that will give hours of up time after a power failure. See
surge protector for an article about UPS.
User Friendly - Anything that is simple
and easy to understand.
UNIX - A type of operating system
developed by Bell Laboratories.