You have come upon the archive of information starting with the letter U. For some time CKnow was not collecting acronyms and definitions but now is. This page shows the older entries with links to the current pages. Use the links below to jump to a specific entry in the archive. A more complete list of all current and archived acronyms and definitions is here.

• 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 = Universal 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