Abbreviations of Computer Related Terms: Alphabet-U

UAAG—User Agent Accessibility Guidelines
UAC—User Account Control
UART—Universal Asynchronous Receiver/Transmitter
UAT—User Acceptance Testing
UCS—Universal Character Set
UDDI—Universal Description, Discovery, and Integration
UDMA—Ultra DMA
UDP—User Datagram Protocol
UEFI—Unified Extensible Firmware Interface
UHF—Ultra High Frequency
UI—User Interface
UL—Upload
ULA—Uncommitted Logic Array
UMA—Upper Memory Area
UMB—Upper Memory Block
UML—Unified Modeling Language
UML—User-Mode Linux
UMPC—Ultra-Mobile Personal Computer
UNC—Universal Naming Convention
UPS—Uninterruptible Power Supply
URI—Uniform Resource Identifier
URL—Uniform Resource Locator
URN—Uniform Resource Name
USB—Universal Serial Bus
usr—user
USR—U.S. Robotics
UTC—Coordinated Universal Time
UTF—Unicode Transformation Format
UTP—Unshielded Twisted Pair
UUCP—Unix to Unix Copy
UUID—Universally Unique Identifier
UUN—Universal User Name
UVC—Universal Virtual Computer
UX—User Experience

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