The Hacker Acronym & Abbreviation Knowledgebase v2.14
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| Acronym |  | Definition | Topics | External Links | |||
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| U | Unit |
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| U/L | Universal / Local | ||||||
| U/L | Upload | ||||||
| UA | Universal Access | ||||||
| UA | Unnumbered Acknowledgment | ||||||
| UA | User Account | ||||||
| UA | User Agent | ||||||
| UAA | Universal Audio Architecture | ||||||
| UAAG |  |
(WAI) User Agent Accessibility Guidelines |
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| UAC | |
User Account Control |
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| UAE | |
Unrecoverable Application Error | |||||
| UAE | User Agent Entity | ||||||
| UAGP | Universal Accelerated Graphics Port | |
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| UAL | User Agent Layer | ||||||
| UAM | User Authentication Method | ||||||
| UAOS | |
User Alliance for Open Systems | |||||
| UAPDU | User Agent Protocol Data Unit | ||||||
| UART | Universal Asynchronous Receiver Transmitter | ||||||
| UAS | UnAvailable Second | ||||||
| UASFE | UnAvailable Second, Far End | ||||||
| UASL | User Agent SubLayer | ||||||
| UAV | Unmanned Aerial Vehicle | ||||||
| UBCIM | Universal Bibliographic Control / International MARC | ||||||
| UBE | Unsolicited Bulk Email | ||||||
| UBR | Unspecified Bit Rate |  |
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| UC | Unified Communications | |
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| UCAID | |
University Corporation for Advanced Internet Development | |||||
| UCAN | |
Unified Community Anchor Network | |
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| UCC | |
Uniform Code Council (now known as GS1) | |
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| UCC | Uniform Commercial Codes | ||||||
| UCD | Uniform Call Distribution | ||||||
| UCE | Unsolicited Commercial Email | ||||||
| UCF | |
Underground Computing Foundation | |||||
| UCF | |
Universal Communication File (.ucf media file format) |
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| UCF | |
Universal Communication Format |
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| UCITA | |
Uniform Computer Information Transaction Act | |||||
| UCL | University College, London | ||||||
| UCMJ | |
Uniform Code of Military Justice | |||||
| UCR | Under Color Removal | ||||||
| UCS | Uniform Communication Standard / Unified Communications System | ||||||
| UCS | |
Universal Character Set (ISO/IEC 10646) |
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| UCS | |
Universal Component System | |||||
| UCW | Unit Control Word | ||||||
| UD | Unit Data | ||||||
| UDA | |
Universal Data Access | |||||
| UDA | User-Defined Applications | ||||||
| UDC | Universal Digit Channel | ||||||
| UDC | User Defined Command | ||||||
| UDDI | |
Universal Description, Discovery, and Integration |
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| UDF | |
Uniqueness Database File | |
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| UDF | |
Universal Disk Format |
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| UDF | User Defined Function |
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| UDI | (Bluetooth) Unrestricted Digital Information |
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| UDI | Unified Display Interface | ||||||
| UDI | Uniform Driver Interface |
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| UDLC | Universal Data Link Control | ||||||
| UDM | Unstructured Data Management | ||||||
| UDMA | |
Ultra Direct Memory Access | |
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| UDO | |
Ultra Density Optical |
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| UDO2 | |
Ultra Density Optical v2 |
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| UDP | |
User Datagram Protocol (RFC 768) |
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| UDRP | |
Uniform Dispute Resolution Policy | |||||
| UDT | User Defined Type | ||||||
| UDVM | Universal Data Voice Multiplexer | ||||||
| UE | User Element | ||||||
| UE | User Equipment | ||||||
| UEFI | |
Unified Extensible Firmware Interface |
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| UEL | Universal Exit Language | ||||||
| UEV | |
(Microsoft) User Experience - Virtualization (usually as UE-V) |
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| UFD | User Friendly Diagnostics | ||||||
| UFDP | |
UnFormatted Data Processor | |||||
| UFOUO | |
Unclassified // For Official Use Only (usually as U//FOUO) |
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| UFS | Unix File System | |
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| UGA | (EFI) Universal Graphic Adapter (protocol) |
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| UHD | Ultra High Density (media) | ||||||
| UHF | Ultra High Frequency | ||||||
| UHQ | |
Ultra High Quality (image technology) | |||||
| UI | Unit Interval | ||||||
| UI | |
UNIX International | |||||
| UI | Unnumbered Information | ||||||
| UI | Unnumbered Interrupt | ||||||
| UI | User Interface | ||||||
| UIC | User Identification Code | ||||||
| UID | User IDentification | ||||||
| UIDE | User Interface Design Environment | ||||||
| UIGEA | |
Unlawful Internet Gambling Enforcement Act (of 2006) |
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| UIMS | User Interface Management Systems | ||||||
| UIS | Universal Information Services | ||||||
| UIST | User Interface Software and Technology (symposium) | ||||||
| UITP | Universal Information Transport Plan | ||||||
| UK | |
United Kingdom (also as .uk ccTLD) |
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| UKCCIS | |
United Kingdom Council for Child Internet Safety |
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| UKRA | United Kingdom Registration Authority | ||||||
| UL | |
Underwriters Laboratories | |||||
| UL | Upload (sometimes as U/L) | ||||||
| UL | User Location | ||||||
| ULA | Upper Layer Architecture | |
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| ULCC | University of London Computing Centre | |
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| ULCT | Upper Layer Conformance Testing | ||||||
| ULP | Upper Layer Protocol / Upper Layer Process | ||||||
| ULTRA | |
Underground Legion of Terroristic Research Activists | |||||
| ULV | Ultra-Low Voltage (processor) | |
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| UMA | Upper Memory Area | ||||||
| UMB | Upper Memory Block | ||||||
| UMD | |
User Manager for Domains | |||||
| UMDF | |
User-Mode Driver Framework | |||||
| UME | UNI Management Entity | ||||||
| UML | Unified Modeling Language | ||||||
| UMPDU | User Message Protocol Data Unit | ||||||
| UMTS | Universal Mobile Telecommunications System | ||||||
| UN | United Nations | ||||||
| UNA | |
Upstream Neighbors Address | |||||
| UNC | Uniform Naming Convention / Universal Naming Convention | ||||||
| UNDI | |
Universal Network Device Interface |
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| UNDP | |
United Nations Development Programme |
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| UNE | |
Ubuntu Netbook Edition | |
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| UNHIOL | |
University of New Hampshire InterOperability Lab | |||||
| UNI | User-to-Network Interface (ATM specification) | ||||||
| UNICODE | |
Unique, Universal, and Uniform character enCoding | |||||
| UNISTAR | UNIversal Single call Telecommunications Answering and Repair | ||||||
| UNJEDI | |
United Nations Joint Electronic Data Interchange | |
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| UNMA | Unified Network Management Architecture | |
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| UNTDI | |
United Nations Trade Data Interchange | |||||
| UOF | Uniform Office Format / Unified Office Format | ||||||
| UOF | Unusual Order Form | ||||||
| UOW | Units Of Work | ||||||
| UP | Unified Process | ||||||
| UP | Uni-Processor | ||||||
| UPC | Unique Porting Code | |
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| UPC | |
United Phreakers Coalition | |||||
| UPC | Universal Product Code | ||||||
| UPC | Update Protect Checking | ||||||
| UPC | Usage Parameter Control | ||||||
| UPC | Utility Port Conditioner | ||||||
| UPH | Units Per Hour | ||||||
| UPI | |
United Phreakers Incorporated (sometimes as UPi) | |||||
| UPI | |
United Press International | |||||
| UPL | |
Unsecured Proxies List | |
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| UPN | Universal Product Number | ||||||
| UPN | User Principal Names | ||||||
| UPS | Uninterruptible Power Supply | |
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| UPS | Uninterruptible Power System | ||||||
| UPS | |
United Parcel Service | |
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| UPT | Universal Personal Telecommunications | ||||||
| UPTC | Unified Page Table Cache | |
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| UPU | Universal Postal Union | |
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| UPX | |
Ultimate Packer for eXecutables |
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| URBAN | Undaground Rap Blastin Asiatic Newsletter | ||||||
| URD | Uncertainty Rule Dialect | ||||||
| URG | Urgent (flag) | ||||||
| URI | |
Uniform Resource Identifier |
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| URISC | Ultimate Reduced Instruction Set Computer | ||||||
| URL | |
Uniform Resource Locator | |
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| URN | |
Uniform Resource Name | |
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| URSI | Union Radio Scientifique Internationale | ||||||
| US | |
Unit Separator (ASCII) | |
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| US | |
United States (official country code and as .us as ccTLD) |
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| USA | Undedicated Switch Access | ||||||
| USA | |
United Software Association | |||||
| USA | |
United States of America |
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| USART | Universal Synchronous Asynchronous Receiver / Transmitter | ||||||
| USB | Universal Serial Bus | ||||||
| USB | Upper SideBand | ||||||
| USC | User Steering Committee | ||||||
| USCERT | |
United States Computer Emergency Readiness Team (usually as US-CERT) |
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| US-CERT | |
United States Computer Emergency Readiness Team |
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| USCIC | |
U.S. Country Information Center | |||||
| USD | |
[U.S.] Under Secretary of Defense | |
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| USD | |
United States Dollar (currency) | |
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| USDN | United States Digital Network | |
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| USFDC | |
U.S. Financial Data Center | |||||
| USGS | |
United States Geological Survey | |||||
| USIBC | |
U.S. Integrated Business Center | |||||
| USIPA | |
United States Internet Providers Association | |||||
| USISPA | |
United States Internet Service Provider Association (formerly Commercial Internet Exchange) | |||||
| USITA | |
United States Independent Telephone Association | |||||
| USL | |
Unix System Laboratories | |||||
| USM | UnSharp Masking | ||||||
| USMP | |
U.S. Manufacturing Planning | |||||
| USNC | United States National Committee | ||||||
| USO | Universal Service Order | ||||||
| USO | Unix Software Operation | ||||||
| USOC | Universal Service Ordering Code | ||||||
| USP | Universal Sampling Plan | ||||||
| USPL | U.S. Price List | ||||||
| USPS | |
United States Postal Service | |
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| USPTO | |
United States Patent and Trademark Office | |
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| USR | |
USRobotics | |
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| USRA | |
Universities Space Research Association | |||||
| USRT | Universal Synchronous Receiver Transmitter | ||||||
| USS | |
(VTAM) Unformatted Systems Service | |||||
| USSS | |
United States Secret Service | |
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| USSTRATCOM | |
United States Strategic Command | |
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| USV | User Services | |
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| UT | Upper Tester | ||||||
| UTAM | Unlicensed Transition And Management | ||||||
| UTC | Unified Translation Cache | ||||||
| UTC | |
Universal Time Coordinated (correctly referenced as Coordinated Universal Time) | |
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| UTF | |
UCS Transformation Format |
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| UTF | |
Unicode Transformation Format |
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| UTF | Unified Threat Management | ||||||
| UTF | Universal Transfer Format | ||||||
| UTF-8 | |
UCS Transformation Format - 8-bit |
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| UTM | Universal Transverse Mercator | ||||||
| UTOPIA | Universal Test and Operations PHY Interface for ATM | ||||||
| UTP | |
Unshielded Twisted-Pair |
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| UTR | |
Unicode Techinical Report |
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| UTRA | Universal Terrestrial Radio Access | ||||||
| UTTP | Unshielded Telephone Twisted Pair | ||||||
| UUA | |
Unisys Users Association | |||||
| UUCICO | Unix to Unix Copy Incoming Copy Outgoing | ||||||
| UUCP | Unix-to-Unix Copy | ||||||
| UUID | Universal Unique IDentifier | ||||||
| UUT | Unit Under Test | ||||||
| UV | UltraViolet | ||||||
| UVC | Universal Voice Channel | ||||||
| UW | Ultra-Wide (usually in reference to SCSI) | |
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| UWB | UltraWideBand | |
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| UX | User Experience |
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| UXU | |
Underground Experts United | |||||
