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Acronyms
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| U | Unclassified |
| U-N | User Network |
| U.K. | United Kingdom |
| U.S.C. | United States Code |
| U/W | Underway |
| U2 | Unclassified Unlimited |
| UA | Unauthorized Absence |
| UA | User Agent |
| UA | User Agents |
| UA | User Authentication |
| UAA | Unit Assembly Area |
| UAB | User Address Book |
| UADSL | Universal Asymmetrical Digital Subscriber Line |
| UAGC | Upper Air Gridded Climatology Data Base |
| UAL | United Airlines |
| UAN | Universal Application Network |
| UAO | Unidentified Audible Object |
| UAP | Unified Accelerated Procedure |
| UAP | User Agent Protocol |
| UAR | United Arab Republic |
| UARC | Upper Atmospheric Research Collaboratory |
| UART | Universal Asynchronous Receiver/Transmitter |
| UART | Universal Asynchronous Receiver Transmitter |
| UAS | Unavailable Seconds |
| UAS | User Account System |
| UASI | Urban Areas Security Initiative |
| UATL | Universal Ada Test Language |
| UAV | Unmanned Aerial Vehicle |
| UAV | Unmanned Aerospace Vehicle |
| UAV | Unmanned Air Vehicle |
| UB | Utility Bus |
| UB | Unified Build |
| UB | Unlicensed Band |
| UBA | Underwater Breathing Apparatus |
| UBC | Uniform Building Code |
| UBC | Universal Block Channel |
| UBI | Uplink Block Identifier |
| UBL | Universal Business Language |
| UBR | Unspecified Bit Rate |
| UBS | User Based Solution |
| UBT | Universal Bus Transceiver |
| UC | Unclassified |
| UC | Unified Command |
| UC | Update Code |
| UC | Utility Computing |
| UCAN | User Circuit mode Access to Network |
| UCAV | Unmanned Combat Air Vehicle |
| UCC | Unified Combatant Command |
| UCC | Uniform Code Council |
| UCCATS | Urban Combat Computer Assisted Training System |
| UCCS | EUCOM Command and Control System |
| UCF | Unregistration Confirm |
| UCFF | UTC Consumption Factors File |
| UCI | Universal Communications Identifier |
| UCI | User Computer Interface |
| UCL | Upper Control Limit |
| UCMJ | Uniform Code of Military Justice |
| UCNI | Unclassified Controlled Nuclear Information |
| UCOFT | Unit Conduct Of Fire Trainer |
| UCP | Unified Command Plan |
| UCP | Universal Communications Processor |
| UCR | Unit Cost Report |
| UCS | Uniform Chromaticity Scale |
| UCS | Uniform Communications Standard |
| UCS | Universal Character Set |
| UCT | Universal Coordinated Time |
| UD | User Data. The N-User data may also be transferred between peer network members (OSI Model) as required. |
| UD | Underwater Diving |
| UD | User Domain |
| UDA | User Definable Assembler |
| UDATS | Underwater Data System |
| UDBAL | Unified Data Base for Acquisition Logistics |
| UDC | User Defined Command |
| UDDI | Universal Description, Discovery, and Integration |
| UDE | Undetected Character Error |
| UDEF | Universal Data Element Framework - for naming data elements |
| UDF | Unit Development Folder |
| UDF | Universal Disk Format |
| UDF | User Defined Format |
| UDI | Unilateral Declaration of Independence |
| UDI | Unique Data Item |
| UDI | Unrestricted Digital Information |
| UDI | User Defined Interface |
| UDL | User Definable Link |
| UDLC | Universal Digital Loop Carrier |
| UDP | Unit Deployment Plan |
| UDP | Unit Deployment Program |
| UDP | Universal Datagram Protocol |
| UDP | User Datagram Protocol |
| UDR | Ulster Defence Regiment |
| UDSL | Universal Digital Subscriber Loop |
| UDT | Underwater Demolition Team |
| UDU | Underwater Demolition Unit |
| UE | Unit Equipment |
| UE | User Equipment |
| UEP | Unequal Error Protection |
| UEP | Update Edit Process |
| UER | Unit Equipment Report |
| UFDR | Universal Flight Data Recorder |
| UFO | UHF Follow On satellite (Navy) |
| UFSP | Underground Facilities Signature Program |
| UGDF | Uniform Gridded Data Field |
| UGS | Unattended Ground Sensor |
| UGV | Unattended Ground Vehicle |
| UGV | Unmanned Ground Vehicle |
| UHCI | Universal Host Controller Interface |
| UHF | Ultra-High Frequency. The portion of the radio spectrum from 300 MHz to 3 GHz. |
| UHF | Ultra High Frequency |
| UHR | Ultra-High Resolution |
| UHRR | Ultra-High Resolution Radar |
| UHT | Ultra Heat Treated |
| UI | UNIX International |
| UI | Unique Identifier |
| UI | Unit Interval |
| UI | Unit of Issue |
| UI | Unnumbered Information |
| UI | User Interface |
| UIC | Unit Identification Code |
| uid | User IDentity, |
| UIDL | User Interface Definition Language |
| UIH | Unnumbered Information with Header check |
| UIL | User Interface Language |
| UIM | User Identity Module |
| UIMS | User Interface Management System |
| UIRK | Unique Interswitch Rekeying Key |
| UIS | User Interface System |
| UISRM | User Interface System Reference Model |
| UJT | Unijunction Transistor |
| UJTL | Unified Joint Task List |
| UJTL | Universal Joint Task List |
| UK/NL AMF | United Kingdom/Netherlands Amphibious Force |
| UKADGE | United Kingdom Air Defense Ground Environment |
| UKADR | United Kingdom Air Defense Region |
| UKCIC | United Kingdom CALS Industry Council |
| UL | Underwriters Laboratory |
| UL | Unlimited |
| UL | Up Link |
| UL | Upper Layer (Defense) |
| ULA | Uncommitted Logic Array |
| ULANA | Unified Local Area Network Architecture |
| ULB | Underwater Locator Beacon |
| ULC | Unit Level Code |
| ULCS | Unit-Level Command Simulation |
| ULD | Unit Load Device |
| ULD | Unlimited Distribution (sometimes just UL) |
| ULL | Unbundled Local Loop |
| ULM | Unified Management Framework |
| ULMS | Unit-Level Message Switch |
| ULN | Unit Line Number |
| ULP | Uneven Level Protection |
| ULP | Upper Layer Protocol |
| ULPA | Ultra Light Particle Arrester |
| ULPI | Unit Level Prototype Implementaion |
| ULS | User Location Service |
| ULSI | Ultra Large Scale Integration |
| ULSI | Ultra Large-Scale Integration |
| ULSS | User’s Logistics Support Summary |
| UM | Unit of Measure |
| UM | User Manual |
| UMA | Unified Memory Architecture |
| UMA | Uniform Memory |
| UMA | Unmanned Aircraft |
| UMB | Upper Memory Block |
| UMCC | Unit Movement Coordination Center |
| UMCM | Underwater Mine Counter-Measures |
| UMEDS | User-Oriented Minimum Essential Data Sets |
| UMF | Unconventional Military Forces |
| UMF | Universal Matched Filter |
| UML | Unified Modeling Language |
| UMMIPS | Uniform Material Movement and Issue Priority System |
| UMT | Universal Mount |
| UMTS | Universal Maintenance Training System |
| UMTS | Universal Mobile Telecommunications System |
| UMV | Unrestricted Motion Vector |
| UN | United Nations |
| UNA | Use No Abbreviations |
| UNA | User Network Aspects |
| UNAA | Universal Network Access Arrangement |
| UNAAF | Unified Action Armed Forces |
| UNAS | Universal Network Architecture Services |
| UNC | United Nations Command |
| UNC | Universal Naming Convention |
| UNCLE | United Network Command for Law Enforcement |
| UNCRYPT | Universal Cryptological Processor Training |
| UNCTAD | UN Conference on Trade and Development |
| UND | Urgency of Need Designator |
| UNDHA | United Nations Department of Humanitarian Affairs |
| UNERM | Unacknowledged Non-Error Recovery Mode |
| UNHCR | UN High Commission on Refugees |
| UNHCR | United Nations High Commissioner’s Office for Refugees |
| UNI | User Network Interface |
| UNIX/UNICS | UNiplexed Information and Computing Service |
| UNJEDI | UN Joint EDI |
| UNK/UNKS | Unknown/Unknowns |
| UNMA | Unified Network Management Architecture |
| UNMO | United Nations Military Observer |
| UNO | UN Organization |
| UNO | United Nations Organization |
| UNPA | United Nations Protected Area |
| Unpaired Channel | A DME channel without a corresponding VOR or ILS frequency. |
| UNPF | United Nations Peace Forces |
| UNPREDEP | United Nations Preventive Deployment Force |
| UNPROFOR | United Nations Protection Force |
| UNREP | Underway Replenishment |
| UNSECNAV | Under Secretary of the Navy |
| UNSM | UN Standard Message |
| UNTL | Universal Naval Task Lists |
| UO | Urban Operations |
| UOC | Usable On Code |
| UOES | User Operational Evaluation System |
| UP | Uniprocessor |
| UP | Used Part |
| UPBO | Upstream Power Back-Off |
| UPC | Uniformed Product Code |
| UPC | Unique Planning Component |
| UPC | Universal Peripheral Controller |
| UPC | Universal Product Code |
| UPC | Usage Parameter Control |
| UPD | Update |
| UPE | Uniform Programming Environment |
| UPED | User Premises Equipment Division |
| UPI | United Press International |
| Uplink | The radio transmission path upward from the earth to the aircraft. |
| uPnP | Universal Plug and Play Forum |
| UPP | User Partnership Program |
| UPR | Upper |
| UPR | Users Performance Requirements |
| UPS | Uninterruptible Power System |
| UPS | Uniform Procurement System |
| UPS | Uninterruptible Power Supply |
| UPS | United Parcel Service |
| UPT | Universal Personal Telecommunications |
| UPTSP | Universal Personal Telecommunications Service Providers |
| UPU | Universal Postal Union |
| UQ | Utility Quality |
| URC | Underway Replenishment Coordinator |
| URCLK | Universal Receiver CLocK |
| URG | Underway Replenishment Group |
| URI | Unified Resource Identifier |
| URI | Uniform Resource Identifier |
| URI | Uniform Resource Indicator |
| URI | University Research Initiative |
| URI | User Premises Equipment Regulatory Issues |
| URISP | University Research Infrastructure Support Program |
| URL | Ubiquity now, Revenues Later |
| URL | Uniform Resource Locator |
| URL | Universal Resource Location |
| URN | Uniform Resource Name |
| URQ | Unregistration Request |
| URRP | University Resident Research Program |
| URS | University Research Support |
| URT | Universal Remote Terminal |
| US | Under Study |
| US | United States |
| US&R | Urban Search and Rescue |
| US-VISIT | United States Visitor and Immigrant Status Inidcator Technology |
| US1 | TDMA Wireless Speech Coder |
| USA | Under Secretary of the Army |
| USA | United States Army |
| USA | United States of America |
| USA PATRIOT Act | Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 |
| USACC | United States Army Communications Command |
| USACE | United States Army Corps of Engineers |
| USACOM | United States Atlantic Command |
| USADACS | U.S. Army Defense Ammunition Center and School |
| USAF | United States Air Force |
| USAFA | United States Air Force Academy |
| USAFE | United States Air Forces in Europe |
| USAG | United States Advisory Group |
| USAID | United States Agency for International Development |
| USAISC | United States Army Information System Command |
| USAISC | United States Army Information Systems Center (Fort Huachuca, AZ) |
| USAITAC | United States Army Intelligence Threat Analysis Center |
| USALMC | US Army Logistics Management College |
| USAMARDA | US Army Manpower Requirements and Documentation Agency |
| USAPPC | United States Army Publications and Printing Command |
| USAR | United States Army Reserve |
| USAREUR | United States Army Europe |
| USARPAC | United States Army Pacific |
| USARSO | United States Army, South |
| USART | Universal Synchronouse Asynchronouse Receiver Transmitter |
| USASAC | United States Army Security Assistance Center |
| USASAC | United States Army Signal Command |
| USASCII | United States of America Standard Code for Information Interchange |
| USASISSDCL | US Army Information Systems Software Development Center-Lee |
| USATSCH | United States Army Transportation School |
| USB | Upper Sideband is the information-carrying band and is the frequency produced by adding the carrier frequency and the modulating frequency. |
| USB | Universal Serial Bus |
| USB | Upper Side Band |
| USC | United States Code |
| USC | Universal Service Code |
| USCENTCOM | United States Central Command |
| USCG | US Coast Guard |
| USCG | United States Coast Guard |
| USCGR | United States Coast Guard Reserves |
| USCINCCENT | Commander in Chief United States Central Command |
| USCINCEUR | Commander in Chief United States European Command |
| USCINCJF | Commander in Chief United States Joint Forces Command |
| USCINCPAC | Commander in Chief United States Pacific Command |
| USCINCSOC | Commander in Chief United States Special Operations Command |
| USCINCSOUTH | Commander in Chief United States Southern Command |
| USCINCSPACE | Commander in Chief United States Space Command |
| USCINCSTRAT | Commander in Chief United States Strategic Command |
| USCINCTRANS | Commander in Chief United States Transportation Command |
| USCINCTRANS | United States Commander in Chief Transportation Command |
| USD(A&T) | Under Secretary of Defense for Acquisition and Technology |
| USD(AT&L) | Under Secretary of Defense (Acquisition, Technology and Logistics) |
| USD(C) | Under Secretary of Defense (Comptroller) |
| USD(P&R) | Under Secretary of Defense (Personnel and Readiness) |
| USD(P) | Under Secretary of Defense (Policy) |
| USDA | United States Department of Agriculture |
| USDC | US Display Consortium |
| USDE | Undesired Signal Data Emanations |
| USE/DA | Users Society for Electronic Design Automation |
| USECT | Understand, Shape, Engage, Consolidate and Transition |
| USEL | Unite Equipment and Supply List |
| USENET | User Network |
| USERIDUSEUCOM | United States European Command |
| USEUCOM | US European Command |
| USEUCOM | United States European Command |
| USFJ | United States Forces Japan |
| USFK | US Forces, Korea |
| USFK | United States Forces Korea |
| USG | UNIX Support Group |
| USG | United States Government |
| USGIC | U.S.GPS Industry Council |
| USIA | United States Information Agency |
| USIM | Universal Subscriber Identity Module |
| USIS | United States Imagery System |
| USJFCOM | U.S. Joint Forces Command |
| USJFCOM | United States Joint Forces Command |
| USL | User Segmented Library |
| USM | User Security Model |
| USMA | United States Military Academy |
| USMC | United States Marine Corps |
| USMCR | United States Marine Corps Reserve |
| USMS | Universal Short Message Service |
| USMTF | Uniform Services Message Text Format |
| USMTF | Uniform Services Message Transfer Format |
| USMTF | United States Message Text Format |
| USMTF | United States Message Text Formatting |
| USMTF | United States Message Transfer Format |
| USN | United States Navy |
| USN | Update Sequence Number |
| USNA | United States Naval Academy |
| USNC | United States National Committee |
| USNI | Universal Simulator Network Interface |
| USNORTHCOM | United States Northern Command |
| USNR | U.S. Naval Reserve |
| USNR | United States Naval Reserve |
| USNS | United States Naval Ship |
| USNSPDM | Naval School, Physical Distribution Management |
| USO | United Service Organization |
| USO | Unix Software Organization |
| USOC | Uniform Service Order Codes |
| USOUTHCOM | United States Southern Command |
| USPACOM | United States Pacific Command |
| USPHS | United States Public Health Service |
| USPRO | US Product Data Association |
| USPS | United States Postal Service |
| USPS | United States Postal Services |
| USR | Universal Space Rectangular |
| USRT | Universal Synchronous Receiver/Transmitter |
| USS | United States Ship |
| USSD | Unstructured Supplementary Service Data |
| USSOCOM | United States Special Operations Command |
| USSOUTHCOM | United States Southern Command |
| USSPACECOM | United States Space Command |
| USSR | Union of Soviet Socialist Republics |
| USSRATCOM | US Strategic Command |
| USSTRATCOM | United States Strategic Command |
| USTA | United States Telecom Association |
| USTB | Unstabilized |
| USTR | United States Trade Representative |
| USTRANSCOM | United States Transportation Command |
| USW | Undersea Warfare |
| USWC | Undersea Warfare Commander |
| UT | Universal Time |
| UT | Upper Tester |
| UTACC | United Trade Association CALS Committee |
| UTAM | Unlicensed Transition and Management |
| UTB | Under the Table Box |
| UTC | Universal Coordinated Time |
| UTC | Coordinated Universal Time |
| UTC | Unit Type Code |
| UTC | Universal Time Code |
| UTC | Universal Time Converted |
| UTC | Universal Time Coordinated |
| UTCLK | Universal Transmitter CLocK |
| UTE | Unmanned Threat Emitter |
| UTF | UCS (Universal Character Set) Transformation Format |
| UTH | Under The Horizon |
| UTIL | Utility |
| UTL | Utilities |
| UTL | Utility |
| UTM | Universal Transverse Mercator |
| UTP | Unshielded Twisted Pair |
| UTR | Universal Transaction Record |
| UTRAN | UMTS Radio Access Network |
| UTSS | Universal Threat System for Simulators |
| UU, U-U | User to User |
| UUCP | UNIX-to-UNIX Copy Package |
| UUCP | Unix to Unix Copy |
| UUCP | Unix-to-Unix Copy |
| uucp | Unit-to-Unit Copy |
| UUI | User User Interface |
| UUID | Unique User Identifier |
| UUIE | User to-User Information Element |
| UUT | Unit Under Test |
| UUV | Unmanned Underwater Vehicle |
| UV | Upper Sideband Voice |
| UV | Ultraviolet |
| UVG | Universal Voice Grade |
| UVLC | Universal Variable Length Codeword |
| UVPROM | Ultraviolet Programmable Read Only Memory |
| UW | Unique Word |
| UW | Unconventional Warfare |
| UWCC | Universal Wireless Communications Consortium |
| UWEF | Underwater Evaluation Facilit |
| UWG | Urban Working Group |
| UWS | Undersea Warfare Systems |
| UWT | Under Water Telephone |
| UX | UNIX |
| UX | Uninterruptible Power Supply |
| UXB | UneXploded Bomb |
| UXP | Unequal Erasure Protection |
