user-defined keys
Keys that can be programmed to mean any combination or string of characters desired.

user-friendly
A term that is used very loosely to describe computer operating systems and applications that are easy to learn and use.

users group
A club or association whose members share an interest in using a specific computer, application or system.

USM
Abbreviation for UnSharp Masking

utility
A type of software that is used to do a specific small job, such as count the words in a file, or run a small calculator or clock. Good utilities are invaluable to enhance the basic computer system.

UTP
Abbreviation for Unshielded Twisted Pair, a type of cabling used for telephones and computer networks.

UV coating
A glossy coating that is applied to a printed sheet or part of a page, then bonded and cured with ultraviolet light.

UV ink
Abbreviation for UltraViolet ink, a special ink that dries quickly through the use of ultraviolet light on the press. This allows for more productivity because there is not need to let the ink dry before printing the other side. The inks are agressive and will shorten the lifespan of the plates used.

UV resistance
The resistance to the fading of colors under direct sunlight

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