The following terms starting with the letter "U" have specific pages dedicated to them. You can come back to this page or the main Computer Terms page by using the navigation breadcrumbs at the bottom of each page.

• UAC = User Account Control
• UART = Universal Asynchronous Receiver/Transmitter
• UCITA = Uniform Computer Information Transaction Act
• UDDI = Universal Description, Discovery and Integration
• UDP = UDP - User Datagram Protocol
• UIN = Universal Internet Number
• ULSI = Ultra Large Scale Integration
• UltraATA = Ultra AT Attachment
• UltraDMA = Ultra Direct Memory Access
• UMB = Upper Memory Block
• UML = Unified Modeling Language
• UNC = Universal Naming Convention
• UNIX = niversal Interactive eXecutive
• UPS = Uninterruptible Power Supply
• URI = Uniform Resource Indicator
• URL = Uniform Resource Locator
• USB = Universal Serial Bus
• USENET = User Network
• USR = U.S. Robotics
• UTP = Unshielded Twisted Pair
• UUCP = UNIX-to-UNIX Copy
• UUENCODE = UNIX-to-UNIX Encode