Glossary Letter U
U - Potential energy, expressed in science as U, is energy that is stored within an object, not in motion but capable of becoming active.
U (measurement) - A U is a standard unit of measure for designating the height in computer enclosures and rack cabinets.
U-SQL - U-SQL is a Microsoft query language that combines a declarative SQL-like syntax with C# programming, enabling it to be used to process both structured and unstructured data in big data environments.
U.2 SSD (formerly SFF-8639) - A U.2 SSD is a high-performance data storage device designed to support the Peripheral Component Interconnect Express (PCIe) interface using a small form factor (SFF) connector that is also compatible with standard Serial-Attached SCSI (SAS) and Serial Advanced Technology Attachment (SATA)-based spinning disks and solid-state drives (SSDs).
U.K. Data Protection Act 1998 (DPA 1998) - The Data Protection Act 1998 (DPA 1998) is an act of the United Kingdom (UK) Parliament defining the ways in which information about living people may be legally used and handled.
U.S. Department of Homeland Security (DHS) - The U.S.
U.S. National Library of Medicine (NLM) - The U.S.
U.S. Navy purchasing abbreviations and acronyms - U.S.
UART - A UART (Universal Asynchronous Receiver/Transmitter) is the microchip with programming that controls a computer's interface to its attached serial devices.
UART (Universal Asynchronous Receiver/Transmitter) - A UART (Universal Asynchronous Receiver/Transmitter) is the microchip with programming that controls a computer's interface to its attached serial devices.
UAT - In software development, user acceptance testing (UAT)—also called application testing, and end user testing—is a phase of software development in which the software is tested in the "real world" by the intended audience.
UBE - UBE (unsolicited bulk email) is a formal term for spam.
Uber - Uber is a transportation company with an app that allows passengers to hail a ride and drivers to charge fares and get paid.
uber geek - An uber geek is a prominent or extreme example of the common geek.
uberAir - uberAIR is an app-hailed air vehicle ride service in the planning stages at Uber.
UberFLEET - UberFLEET is a smartphone application that allows partners with Uber, a popular rideshare application, to oversee their fleet drivers.
ubiquitous computing - Pervasive computing, also called ubiquitous computing, is the growing trend of embedding computational capability (generally in the form of microprocessors) into everyday objects to make them effectively communicate and perform useful tasks in a way that minimizes the end user's need to interact with computers as computers.
ubiquitous networking - Ubiquitous networking is the pervasion of communications infrastructure and wireless technologies throughout the environment such that they enable continuous connectivity.
ubiquitous robotics - Ubiquitous robotics is the design and deployment of robots in smart network environments in which everything is interconnected.
ubiquitous sensor network (USN) - A ubiquitous sensor network (USN) is one that connects all possible sensors in a given network or environment which, theoretically, could be global.
UBL - Universal Business Language (UBL) is a royalty-free set of documents based on the ebXML (Electronic Business XML) Core Components Technical Specification, also known as ISO 15000-5.
Ubuntu - Ubuntu (pronounced oo-BOON-too) is an open source Debian-based Linux distribution.
Ubuntu Core - Ubuntu Core is a transactional version of the Ubuntu Linux OS, made specifically for internet of things (IoT) devices and large container deployments.
UC - Unified communications (UC) is a conceptual and technological framework for integrating various enterprise communication methods -- telephony, presence, voicemail, video calling and conferencing, email, instant messaging, etc.
UCaaS (Unified Communications as a Service) - Unified communications as a service (UCaaS) is a cloud delivery model that offers a variety of communication and collaboration applications and services.
UCE - UCE (unsolicited commercial e-mail) is a legal term used to describe an electronic promotional message sent to a consumer without the consumer's prior request or consent.
UCM - Configuration management (CM) is an information governance and systems engineering process to ensure consistency among physical and logical assets in an operational environment.
UCS - A unified computing system (UCS) is is a converged data center architecture that integrates computing, networking and storage resources to increase efficiency and enable centralized management.
UDA - Universal Data Access (UDA) is Microsoft's model or framework for a single uniform application program interface to different software makers' databases, both relational and nonrelational.
UDDI - UDDI (Universal Description, Discovery, and Integration) is an XML-based registry for businesses worldwide to list themselves on the Internet.
UDDI (Universal Description, Discovery, and Integration) - UDDI (Universal Description, Discovery, and Integration) is an XML-based registry for businesses worldwide to list themselves on the Internet.
UDF - Universal Disk Format (UDF) is a CD-ROM and DVD file system standard developed as a means of ensuring consistency among data written to various optical media, by facilitating both data interchange and the implementation of the ISO/IEC 13346 standard.
UDMA - Ultra DMA (UDMA, or, more accurately, Ultra DMA/33) is a protocol for transferring data between a hard disk drive through the computer's data paths (or bus) to the computer's random access memory (RAM).
UDO - Ultra density optical (UDO) is an optical storage technology that increases capacities by using an extremely focused blue laser to write and read data.
UDO (ultra density optical) - Ultra density optical (UDO) is an optical storage technology that increases capacities by using an extremely focused blue laser to write and read data.
UDP - UDP (User Datagram Protocol) is a communications protocol that is primarily used for establishing low-latency and loss-tolerating connections between applications on the internet.
UDP (User Datagram Protocol) - UDP (User Datagram Protocol) is a communications protocol that is primarily used for establishing low-latency and loss-tolerating connections between applications on the internet.
UEFI - Unified Extensible Firmware Interface, or UEFI, specifies how a software program connects a computer's firmware to its operating system and attached computing hardware.
UHDV - UHDV (ultra high definition video) is a technology that provides video image resolution containing 16 times as many pixels as HDTV (high definition television).
UHDV (ultra high definition video) - UHDV (ultra high definition video) is a technology that provides video image resolution containing 16 times as many pixels as HDTV (high definition television).
UHF - The UHF (ultrahigh frequency) range of the radio spectrum is the band extending from 300 MHz to 3 GHz.
UI - The user interface (UI) is the point of human-computer interaction and communication in a device.
UI redressing - Clickjacking (also known as user-interface or UI redressing and IFRAME overlay) is an exploit in which malicious coding is hidden beneath apparently legitimate buttons or other clickable content on a website.
UIA - User installed applications (UIA) are programs that are installed on a computer by an end user, instead of by a corporate IT department.
UIML - UIML (User Interface Markup Language) is a descriptive language that lets you create a Web page that can be sent to any kind of interface device - for example, to a PC with a large display and a keyboard or to a "smart phone" with a tiny display and no keyboard.
UIML (User Interface Markup Language) - UIML (User Interface Markup Language) is a descriptive language that lets you create a Web page that can be sent to any kind of interface device - for example, to a PC with a large display and a keyboard or to a "smart phone" with a tiny display and no keyboard.
UK Data Protection Act 1998 - The Data Protection Act 1998 (DPA 1998) is an act of the United Kingdom (UK) Parliament defining the ways in which information about living people may be legally used and handled.
UK Government Connect Secure Extranet - The UK Government Connect Secure Extranet (GCSX) is a secure WAN that allows officials at local public-sector organisations to interact and share data privately and securely with central government departments.
UK Government Connect Secure Extranet (GCSX) - The UK Government Connect Secure Extranet (GCSX) is a secure WAN that allows officials at local public-sector organisations to interact and share data privately and securely with central government departments.
UK Identity Cards Act - The UK Identity Cards Act is a framework of enabling legislation for a British National Identity card passed in 2006.
ultra density optical - Ultra density optical (UDO) is an optical storage technology that increases capacities by using an extremely focused blue laser to write and read data.
Ultra DMA - Ultra DMA (UDMA, or, more accurately, Ultra DMA/33) is a protocol for transferring data between a hard disk drive through the computer's data paths (or bus) to the computer's random access memory (RAM).
Ultra DMA (UDMA or Ultra DMA/33) - Ultra DMA (UDMA, or, more accurately, Ultra DMA/33) is a protocol for transferring data between a hard disk drive through the computer's data paths (or bus) to the computer's random access memory (RAM).
Ultra DMA 33 - Ultra DMA (UDMA, or, more accurately, Ultra DMA/33) is a protocol for transferring data between a hard disk drive through the computer's data paths (or bus) to the computer's random access memory (RAM).
Ultra DMA33 - Ultra DMA (UDMA, or, more accurately, Ultra DMA/33) is a protocol for transferring data between a hard disk drive through the computer's data paths (or bus) to the computer's random access memory (RAM).
Ultra Extended Graphics Array - UXGA (Ultra Extended Graphics Array) is a display modein which the resolutionis 1600 pixels horizontally by 1200 pixels vertically (1600 x 1200).
ultra HD - Full HDTV, also referred to as ultra-HD, true HDTV, and 1080p, is a television (TV) display technology specification that surpasses the quality over the original 720p high-definition television (HDTV) technology specification, providing an image resolution of 1920 by 1080 pixels.
ultra HDTV - Full HDTV, also referred to as ultra-HD, true HDTV, and 1080p, is a television (TV) display technology specification that surpasses the quality over the original 720p high-definition television (HDTV) technology specification, providing an image resolution of 1920 by 1080 pixels.
ultra high definition video - UHDV (ultra high definition video) is a technology that provides video image resolution containing 16 times as many pixels as HDTV (high definition television).
Ultra High-Definition TV (UHDTV) - Ultra-high-definition (UHD) television, also abbreviated UHDTV, is a digital television display format in which the horizontal screen resolution is on the order of 4000 pixels (4K UHD) or 8000 pixels (8K UHD).
Ultra Low Energy (ULE) - Ultra Low Energy (ULE) is a telecommunications technology based on DECT (Digital Enhanced Cordless Telecommunications) which is the de-facto standard for voice calls, integrated in millions of devices worldwide.
Ultra mobile PC - Ultra-mobile PC (UMPC) is a design specification for a hand-held computer that is larger than a PDA but smaller than a laptop.
ultra personal computer - A handtop is a full-featured portable computer that is slightly larger than a PDA, but much smaller than a laptop.
ultra wideband - Ultra wideband (also known as UWB or as digital pulse wireless) is a wireless technology for transmitting large amounts of digital data over a wide spectrum of frequency bands with very low power for a short distance.
ultra-HD - Full HDTV, also referred to as ultra-HD, true HDTV, and 1080p, is a television (TV) display technology specification that surpasses the quality over the original 720p high-definition television (HDTV) technology specification, providing an image resolution of 1920 by 1080 pixels.
ultra-mobile personal computer - Ultra-mobile PC (UMPC) is a design specification for a hand-held computer that is larger than a PDA but smaller than a laptop.
ultra-mobile personal computer (UMPC or Ultra-mobile PC) - Ultra-mobile PC (UMPC) is a design specification for a hand-held computer that is larger than a PDA but smaller than a laptop.
ultrabook - An ultrabook is a category of thin and light laptop computers designed to bridge the market gap between tablets and premium notebook PCs.
ultracapacitor - An ultracapacitor, also called a supercapacitor, is an electrical component capable of holding hundreds of times more electrical charge quantity than a standard capacitor.
ultrahigh frequency - The UHF (ultrahigh frequency) range of the radio spectrum is the band extending from 300 MHz to 3 GHz.
ultrapersonal computer - A handtop is a full-featured portable computer that is slightly larger than a PDA, but much smaller than a laptop.
ultrasound - Ultrasound is acoustic (sound) energy in the form of waves having a frequency above the human hearing range.
ultrawideband - Ultra wideband (also known as UWB or as digital pulse wireless) is a wireless technology for transmitting large amounts of digital data over a wide spectrum of frequency bands with very low power for a short distance.
UMA - The Generic Access Network (GAN) is an evolving wireless communications system in which mobile phone sets function seamlessly between local area networks (LANs) and wide-area networks (WANs).
UML - UML (Unified Modeling Language) is a standard notation for the modeling of real-world objects as a first step in developing an object-oriented design methodology.
UML (Unified Modeling Language) - UML (Unified Modeling Language) is a standard notation for the modeling of real-world objects as a first step in developing an object-oriented design methodology.
UMLS - Unified Medical Language System (UMLS) is a comprehensive list of biomedical terms for developing computer systems capable of understanding the specialized vocabulary used in biomedicine and health care.
UMPC - Ultra-mobile PC (UMPC) is a design specification for a hand-held computer that is larger than a PDA but smaller than a laptop.
UMS - Unified messaging (sometimes referred to as the unified messaging system or UMS) is the handling of voice, fax, and regular text messages as objects in a single mailbox that a user can access either with a regular e-mail client or by telephone.
UMTS - UMTS (Universal Mobile Telecommunications System) is a so-called "third-generation (3G)," broadband, packet -based transmission of text, digitized voice, video, and multimedia at data rates up to and possibly higher than 2 megabits per second (Mbps), offering a consistent set of services to mobile computer and phone users no matter where they are located in the world.
UMTS - UMTS (Universal Mobile Telecommunications Service) is a third-generation (3G) broadband, packet-based transmission of text, digitized voice, video, and multimedia at data rates up to 2 megabits per second (Mbps).
UMTS (Universal Mobile Telecommunications Service) - UMTS (Universal Mobile Telecommunications Service) is a third-generation (3G) broadband, packet-based transmission of text, digitized voice, video, and multimedia at data rates up to 2 megabits per second (Mbps).
unary - The term unary defines operators in Boolean (binary) algebra, trinary algebra, arithmetic, and set theory.
unauthenticated security scan (logged-out secuity scan) - An unauthenticated security scan, sometimes called a logged-out scan, is the process of exploring a network or networked system for vulnerabilities that are accessible without logging in as an authorized user.
UNC - In a network, the Universal Naming Convention (UNC) is a way to identify a shared file in a computer without having to specify (or know) the storage device it is on.
uncanny valley - The uncanny valley is a common unsettling feeling people experience where androids (humanoid robots) and audio/visual simulations closely resemble humans in many respects but are not quite realistic.
uncertainty principle - The uncertainty principle is the concept that precise, simultaneous measurement of some complementary variables -- such as the position and momentum of a subatomic particle -- is impossible.
uncloud (cloud repatriation) - Unclouding, also called cloud repatriation, is the retrieval of applications and data from a cloud computing platform.
uncompressing - Uncompressing (or decompressing) is the act of expanding a compression file back into its original form.
uncompressing (or decompressing) - Uncompressing (or decompressing) is the act of expanding a compression file back into its original form.
unconference - An unconference is a conference organized, structured and led by the people attending it.
undercapitalization - Undercapitalization is a situation when an organization lacks the availability of funds needed to conduct regular business.
Undernet - For terms frequently used in online keyboard chatting, see chat acronyms/IRC/BBS.
underwater remotely operated vehicle - An underwater remotely operated vehicle (ROV) is a mobile robot designed for aquatic work environments.
underwater ROV - An underwater remotely operated vehicle (ROV) is a mobile robot designed for aquatic work environments.
underwater ROV (underwater remotely operated vehicle) - An underwater remotely operated vehicle (ROV) is a mobile robot designed for aquatic work environments.
unexplained wealth order (UWO) - An unexplained wealth order (UWO) is an investigative tool used by law enforcement that can be used with other civil powers to identify and retrieve the proceeds of criminal activities from the recipients.
unicast - Unicast is communication between a single sender and a single receiver over a network.
Unicode - Unicode is an entirely new idea in setting up binary codes for text or script characters.
unicorn - A unicorn, in an investment context, is a tech startup that is assessed at a valuation of $1 billion or more.
unified communications (UC) - Unified communications (UC) is an umbrella term for the integration of multiple enterprise communication tools -- such as voice calling, video conferencing, instant messaging (IM), presence, content sharing, etc.
unified communications and collaboration (UCC) - Unified communications and collaboration (UCC) is the collection of technology and software that combines enterprise communication with real time, asynchronous cooperation capabilities.
unified computing system - A unified computing system (UCS) is is a converged data center architecture that integrates computing, networking and storage resources to increase efficiency and enable centralized management.
unified computing system (UCS) - A unified computing system (UCS) is is a converged data center architecture that integrates computing, networking and storage resources to increase efficiency and enable centralized management.
unified endpoint management (UEM) - Unified endpoint management (UEM) is an approach to securing and controlling desktop computers, laptops, smartphones and tablets in a connected, cohesive manner from a single console.
Unified Extensible Firmware Interface - Unified Extensible Firmware Interface, or UEFI, specifies how a software program connects a computer's firmware to its operating system and attached computing hardware.
Unified Extensible Firmware Interface (UEFI) - Unified Extensible Firmware Interface, or UEFI, specifies how a software program connects a computer's firmware to its operating system and attached computing hardware.
unified field theory - Unified field theory is sometimes called the Theory of Everything (TOE, for short): the long-sought means of tying together all known phenomena to explain the nature and behavior of all matter and energy in existence.
unified field theory or Theory of Everything (TOE) - Unified field theory is sometimes called the Theory of Everything (TOE, for short): the long-sought means of tying together all known phenomena to explain the nature and behavior of all matter and energy in existence.
Unified Medical Language System - Unified Medical Language System (UMLS) is a comprehensive list of biomedical terms for developing computer systems capable of understanding the specialized vocabulary used in biomedicine and health care.
Unified Medical Language System (UMLS) - Unified Medical Language System (UMLS) is a comprehensive list of biomedical terms for developing computer systems capable of understanding the specialized vocabulary used in biomedicine and health care.
unified messaging - Unified messaging (sometimes referred to as the unified messaging system or UMS) is the handling of voice, fax, and regular text messages as objects in a single mailbox that a user can access either with a regular e-mail client or by telephone.
unified messaging (unified messaging system or UMS) - Unified messaging (sometimes referred to as the unified messaging system or UMS) is the handling of voice, fax, and regular text messages as objects in a single mailbox that a user can access either with a regular e-mail client or by telephone.
unified messaging server (UM server) - The unified messaging server is a server role in Exchange Server 2007 and Exchange Server 2010 that integrates users' voice mail with Exchange email.
unified messaging system - Unified messaging (sometimes referred to as the unified messaging system or UMS) is the handling of voice, fax, and regular text messages as objects in a single mailbox that a user can access either with a regular e-mail client or by telephone.
Unified Modeling Language - UML (Unified Modeling Language) is a standard notation for the modeling of real-world objects as a first step in developing an object-oriented design methodology.
unified network management - Unified network management is the administration of both wired and wireless networks through a single interface.
unified storage - Unified storage -- sometimes called network unified storage or multiprotocol storage -- is a storage system that makes it possible to run and manage files and applications from a single device.
unified storage (multiprotocol storage) - Unified storage -- sometimes called network unified storage or multiprotocol storage -- is a storage system that makes it possible to run and manage files and applications from a single device.
unified threat management - Unified threat management (UTM) describes an information security (infosec) system that provides a single point of protection against threats, including viruses, worms, spyware and other malware, and network attacks.
unified threat management (UTM) - Unified threat management (UTM) describes an information security (infosec) system that provides a single point of protection against threats, including viruses, worms, spyware and other malware, and network attacks.
Uniform Resource Identifier - A URI (Uniform Resource Identifier) is a sequence of characters that identifies a logical or physical resource on a network.
Uniform Resource Locator - A URL (Uniform Resource Locator) is a unique identifier used to locate a resource on the internet.
Uniform Resource Name - A URN (Uniform Resource Name) is an Internet resource with a name that, unlike a URL, has persistent significance - that is, the owner of the URN can expect that someone else (or a program) will always be able to find the resource.
unikernel - A unikernel is a library-based operating system that only includes functionalities required by the specific application that runs on it.
uninterruptible power supply - An uninterruptible power supply (UPS) is a device that allows a computer to keep running for at least a short time when the primary power source is lost.
uninterruptible power supply (UPS) - An uninterruptible power supply (UPS) is a device that allows a computer to keep running for at least a short time when the primary power source is lost.
union symbol - The union symbol () denotes the union of two set s.
unipolar signaling - Unipolar signaling, also called unipolar transmission ,is a baseband method of sending binary data over wire or cable.
unipolar signaling (unipolar transmission) - Unipolar signaling, also called unipolar transmission ,is a baseband method of sending binary data over wire or cable.
unipolar transmission - Unipolar signaling, also called unipolar transmission ,is a baseband method of sending binary data over wire or cable.
unique default password - Unique default passwords can provide more security, although that depends on what type of system is used.
unique device identifier (UDID) - A unique device identifier (UDID) is a 40-character string assigned to certain Apple devices including the iPhone, iPad, and iPod Touch.
Unique Identification Authority of India (UIDAI) - Unique Identification Authority of India (UIDAI) is the issuing authority of Aadhaar cards (aka unique identification numbers or UIDs).
unique identifier (UID) - A unique identifier (UID) is a numeric or alphanumeric string that is associated with a single entity within a given system.
unique selling point (USP) - A unique selling proposition (USP, also seen as unique selling point) is a factor that differentiates a product from its competitors, such as the lowest cost, the highest quality or the first-ever product of its kind.
unique user - In Web marketing, a unique user is, for a specified period of time such as a day or month, an individual that has visited a Web site or received specific content, such as ads, e-mail, or newsletters.
Unisys - Unisys is an American multinational information technology company that provides hardware, software, IT services and consulting.
unit of pressure - The pascal (pronounced pass-KAL and abbreviated Pa) is the unit of pressure or stress in the International System of Units (SI).
unit of stress - The pascal (pronounced pass-KAL and abbreviated Pa) is the unit of pressure or stress in the International System of Units (SI).
unit testing - Unit testing is a software development process in which the smallest testable parts of an application, called units, are individually and independently scrutinized for proper operation.
United Launch Alliance (ULA) - United Launch Alliance (ULA) is a private aerospace launch provider.
United States Census - The United States Census is a national survey conducted every ten years to enumerate the population for taxation and political representation.
United States Department of Commerce - The United States Department of Commerce (DOC) is a cabinet-level bureau of the United States federal government tasked with the promotion of U.
United States Department of Energy (DOE) - United States Department of Energy (DOE) is a federal cabinet agency that is tasked with overseeing the energy economy, energy policies and energy security of the U.
United States Department of Labor - The United States Department of Labor (U.
United States Department of Transportation - The United States Department of Transportation (USDOT or DOT) is a cabinet agency of the U.
United States Secret Service (USSS) - The United States Secret Service (USSS) is a federal law enforcement agency mandated by Congress to carry out two sets of primary objectives: provide protection for designated sites and events as well as national and visiting leaders, and preserve the integrity of the U.
Universal 2nd Factor (U2F) - Universal 2nd Factor (U2F) is a type of physical authentication device that uses encryption and private keys to protect and unlock supported accounts.
universal acceptance (UA) - Universal acceptance (UA) is a best practice that ensures all domain names and email addresses work with all applications, devices and systems.
universal access server - A network access server (NAS) is a computer server that enables an independent service provider (ISP) to provide connected customers with Internet access.
Universal ADSL - For more information, see Digital Subscriber Line.
Universal Asynchronous Receiver Transmitter - A UART (Universal Asynchronous Receiver/Transmitter) is the microchip with programming that controls a computer's interface to its attached serial devices.
universal authentication - Universal authentication is a network identity-verification method that allows users to move from site to site securely without having to enter identifying information multiple times.
universal basic income (UBI) - Universal basic income (UBI) is a model for providing all citizens of a country or other geographic area with a given sum of money, regardless of their income, resources or employment status.
Universal Business Language - Universal Business Language (UBL) is a royalty-free set of documents based on the ebXML (Electronic Business XML) Core Components Technical Specification, also known as ISO 15000-5.
Universal Business Language (UBL) - Universal Business Language (UBL) is a royalty-free set of documents based on the ebXML (Electronic Business XML) Core Components Technical Specification, also known as ISO 15000-5.
Universal Coordinated Time - Coordinated Universal Time (abbreviated as UTC, and therefore often spelled out as Universal Time Coordinated and sometimes as Universal Coordinated Time) is the standard time common to every place in the world.
Universal Data Access - Universal Data Access (UDA) is Microsoft's model or framework for a single uniform application program interface to different software makers' databases, both relational and nonrelational.
Universal Data Access (UDA) - Universal Data Access (UDA) is Microsoft's model or framework for a single uniform application program interface to different software makers' databases, both relational and nonrelational.
Universal Description Discovery and Integration - UDDI (Universal Description, Discovery, and Integration) is an XML-based registry for businesses worldwide to list themselves on the Internet.
Universal Description, Discovery, and Integration - UDDI (Universal Description, Discovery, and Integration) is an XML-based registry for businesses worldwide to list themselves on the Internet.
Universal Disk Format - Universal Disk Format (UDF) is a CD-ROM and DVD file system standard developed as a means of ensuring consistency among data written to various optical media, by facilitating both data interchange and the implementation of the ISO/IEC 13346 standard.
Universal Disk Format (UDF) - Universal Disk Format (UDF) is a CD-ROM and DVD file system standard developed as a means of ensuring consistency among data written to various optical media, by facilitating both data interchange and the implementation of the ISO/IEC 13346 standard.
Universal Mobile Telecommunications Service - UMTS (Universal Mobile Telecommunications Service) is a third-generation (3G) broadband, packet-based transmission of text, digitized voice, video, and multimedia at data rates up to 2 megabits per second (Mbps).
Universal Mobile Telecommunications System - UMTS (Universal Mobile Telecommunications System) is a so-called "third-generation (3G)," broadband, packet -based transmission of text, digitized voice, video, and multimedia at data rates up to and possibly higher than 2 megabits per second (Mbps), offering a consistent set of services to mobile computer and phone users no matter where they are located in the world.
Universal Mobile Telecommunications System (UMTS) - UMTS (Universal Mobile Telecommunications System) is a so-called "third-generation (3G)," broadband, packet -based transmission of text, digitized voice, video, and multimedia at data rates up to and possibly higher than 2 megabits per second (Mbps), offering a consistent set of services to mobile computer and phone users no matter where they are located in the world.
universal molar gas constant - The gas constant, also known as the universal molar gas constant, is a physical constant that appears in an equation defining the behavior of a gas under theoretically ideal conditions.
Universal Naming Convention - In a network, the Universal Naming Convention (UNC) is a way to identify a shared file in a computer without having to specify (or know) the storage device it is on.
Universal Naming Convention (UNC) - In a network, the Universal Naming Convention (UNC) is a way to identify a shared file in a computer without having to specify (or know) the storage device it is on.
universal network - The "universal network" is the idea of a single network that integrates the existing voice and public telecommunications network (including the Internet), cable TV, data networks, and video broadcast networks so that they work together well.
Universal Plug and Play - Universal Plug and Play (UPnP) is a standard that uses Internet and Web protocols to enable devices such as PCs, peripherals, intelligent appliances, and wireless devices to be plugged into a network and automatically know about each other.
Universal Plug and Play (UPnP) - Universal Plug and Play (UPnP) is a standard that uses Internet and Web protocols to enable devices such as PCs, peripherals, intelligent appliances, and wireless devices to be plugged into a network and automatically know about each other.
Universal Powerline Bus (UPB) - Universal Powerline Bus (UPB) is a communication methodology for home automation device control, allowing devices to communicate with pulse-position modulation through power lines.
Universal Resource Identifier - A URI (Uniform Resource Identifier) is a sequence of characters that identifies a logical or physical resource on a network.
Universal Resource Locator - A URL (Uniform Resource Locator) is a unique identifier used to locate a resource on the internet.
Universal Serial Bus - USB (Universal Serial Bus) is a plug-and-play interface between a computer and add-on devices, such as media players, keyboards, telephones, digital cameras, scanners, flash drives, joysticks and printers.
Universal Service Fund (USF) - The Universal Service Fund (USF) is a United States government program that supports telecommunications access and affordability in rural and low-income communities.
universal set - A universal set is the collection of all objects in a particular context or theory.
Universal Time Coordinated - Coordinated Universal Time (abbreviated as UTC, and therefore often spelled out as Universal Time Coordinated and sometimes as Universal Coordinated Time) is the standard time common to every place in the world.
Universal Unique Identifier - A UUID (Universal Unique Identifier) is a 128-bit number used to uniquely identify some object or entity on the Internet.
Universal Windows app - A Universal Windows app is a software program that uses the Windows 8 or Windows 10 codebase and runs the same way on PCs, Windows tablets and smartphones.
Unix - Unix -- often spelled UNIX, especially as an official trademark -- is a multi-user operating system designed for flexibility and adaptability.
UNIX 03 - The Single UNIX Specification is an industry standard description of the C language program and user command interfaces for a standard Unix operating system.
UNIX 93 - The Single UNIX Specification is an industry standard description of the C language program and user command interfaces for a standard Unix operating system.
UNIX 95 - The Single UNIX Specification is an industry standard description of the C language program and user command interfaces for a standard Unix operating system.
UNIX 98 - The Single UNIX Specification is an industry standard description of the C language program and user command interfaces for a standard Unix operating system.
Unix Cheat Sheets - We've gathered cheat sheets for fast reference to Unix-related information.
UNIX to UNIX Copy Protocol - UUCP (UNIX-to-UNIX Copy Protocol) is a set of UNIX programs for copying (sending) files between different UNIX systems and for sending commands to be executed on another system.
UNIX-to-UNIX Copy Protocol - UUCP (UNIX-to-UNIX Copy Protocol) is a set of UNIX programs for copying (sending) files between different UNIX systems and for sending commands to be executed on another system.
unknowable risk - An unknowable risk is a potential threat to an organization's processes that is not known and cannot be quantified or controlled.
unknown known - An unknown known is information that an individual or organization has in its possession but whose existence, relevance or value has not been realized.
unknown unknown - An unknown unknown is unidentified information.
Unlicensed Mobile Access - The Generic Access Network (GAN) is an evolving wireless communications system in which mobile phone sets function seamlessly between local area networks (LANs) and wide-area networks (WANs).
unlocked cell phone - An unlocked cell phone is a cellular telephone handset that can be used with more than one service provider, making it easy for a user to switch from one cellular network to another.
Unmanned Systems Technology (UST) - Unmanned Systems Technology (UST) is the software and hardware systems that drive semi- and fully-autonomous vehicles.
unobtainium - Unobtainium is a term used to refer to a material that cannot be accessed.
Unshielded Twisted Pair (UTP) - Unshielded twisted pair (UTP) is a ubiquitous type of copper cabling used in telephone wiring and local area networks (LANs).
unsolicited bulk e-mail - UBE (unsolicited bulk email) is a formal term for spam.
unsolicited bulk email - UBE (unsolicited bulk email) is a formal term for spam.
unsolicited commercial e-mail - UCE (unsolicited commercial e-mail) is a legal term used to describe an electronic promotional message sent to a consumer without the consumer's prior request or consent.
unsolicited commercial email - UCE (unsolicited commercial e-mail) is a legal term used to describe an electronic promotional message sent to a consumer without the consumer's prior request or consent.
unsourcing - Unsourcing is the transfer of an organization's customer service and support functions from paid employees to unpaid or low-paid online communities.
unstructured data - Unstructured data is information, in many different forms, that doesn't follow conventional data models, making it difficult to store and manage in a mainstream relational database.
Unstructured Supplementary Service Data - USSD (Unstructured Supplementary Service Data) is a GSM (Global System for Mobile) communications protocol that is used to send text messages.
unstructured text - The unstructured text collected from social media activities plays a key role in predictive analytics for the enterprise because it is a prime source for sentiment analysis to determine the general attitude of consumers toward a brand or idea.
unsupervised learning - Unsupervised learning refers to the use of artificial intelligence (AI) algorithms to identify patterns in data sets containing data points that are neither classified nor labeled.
unzipping - Unzipping is the act of extracting the files from a zipped single file or similar file archive.
up converter - An HD (high-definition) upconverter, also known as a digital television (DTV) upconverter, is a device that converts the digital data on a DVD to a format that can be viewed directly on a high-definition television (HDTV) receiver without intermediate conversion to an analog signal.
up-sell - Up-sell is a marketing term for the practice of suggesting higher priced products or services to a customer who is considering a purchase.
upcharge - An upcharge is an additional fee that is added to a bill after a contract has already been negotiated.
upconverter - An HD (high-definition) upconverter, also known as a digital television (DTV) upconverter, is a device that converts the digital data on a DVD to a format that can be viewed directly on a high-definition television (HDTV) receiver without intermediate conversion to an analog signal.
upcycling - Upcycling is the practice of creating a useable product from waste or unwanted items or adapting an existing product in some way to add value.
update sequence number (USN) - An update sequence number (USN) is a 64-bit number in Active Directory that increments time as changes occur.
upgrade - In computers, an upgrade is a new version of or addition to a hardware or, more often, software product that is already installed or in use.
uplift modeling - Uplift modeling is a type of data analytics that uses predictive modeling to identify individuals who can be positively influenced by a specific outreach effort.
uplink - These terms should not be confused with downstream and upstream.
uploading - Uploading is the transmission of a file from one computer system to another, usually larger computer system.
UPN - In the Windows operating system's Active Directory, a User Principal Name (UPN) is the name of a system user in an e-mail address format.
UPnP - Universal Plug and Play (UPnP) is a standard that uses Internet and Web protocols to enable devices such as PCs, peripherals, intelligent appliances, and wireless devices to be plugged into a network and automatically know about each other.
UpperCamelCase - UpperCamelCase (part of CamelCase) is a naming convention in which a name is formed of multiple words that are joined together as a single word with the first letter of each of the multiple words capitalized within the new word that forms the name.
upright slash - The vertical line, also called the vertical slash or upright slash (|), is used in mathematical notation in place of the expression "such that" or "it is true that.
UPS - An uninterruptible power supply (UPS) is a device that allows a computer to keep running for at least a short time when the primary power source is lost.
upskilling - Upskilling is a workplace trend that facilitates continuous learning by providing training programs and development opportunities that expand an employee's abilities and minimize skill gaps.
upstream - This term should not be confused with downlink.
uptime - Uptime is a computer industry term for the time during which a computer is operational.
uptime and downtime - Uptime is a computer industry term for the time during which a computer is operational.
Uptime Institute, Inc. - The Uptime Institute, Inc.
Uptime Institute’s data center tier standards - The Uptime Institute’s data center tier standards are a standardized methodology used to determine availability in a facility.
urban legend - An urban legend is a tale of contemporary folklore that purports to be true and is often designed to elicit an emotional response from the audience.
URI - A URI (Uniform Resource Identifier) is a sequence of characters that identifies a logical or physical resource on a network.
URI (Uniform Resource Identifier) - A URI (Uniform Resource Identifier) is a sequence of characters that identifies a logical or physical resource on a network.
URL - A URL (Uniform Resource Locator) is a unique identifier used to locate a resource on the internet.
URL (Uniform Resource Locator) - A URL (Uniform Resource Locator) is a unique identifier used to locate a resource on the internet.
URL manipulation - URL manipulation, also called URL rewriting, is the process of altering (often automatically by means of a program written for that purpose) the parameters in a URL (Uniform Resource Locator).
URL manipulation (URL rewriting) - URL manipulation, also called URL rewriting, is the process of altering (often automatically by means of a program written for that purpose) the parameters in a URL (Uniform Resource Locator).
URL poisoning - URL poisoning, also known as location poisoning, is a method of tracking Web user behavior by adding an identification (ID) number to the page address (Uniform Resource Locator) line of the Web browser when a user visits a particular site.
URL poisoning (location poisoning) - URL poisoning, also known as location poisoning, is a method of tracking Web user behavior by adding an identification (ID) number to the page address (Uniform Resource Locator) line of the Web browser when a user visits a particular site.
URL rewriting - URL manipulation, also called URL rewriting, is the process of altering (often automatically by means of a program written for that purpose) the parameters in a URL (Uniform Resource Locator).
URL shortener - A URL shortener is a Web site that will create a short Uniform Resource Locator (URL) or Web page address from a long one so that the short version, which is easier to remember and enter, can be used instead.
URL shortening - URL shortening is the translation of a long Uniform Resource Locator (URL) into an abbreviated alternative that redirects to the longer URL.
URN - A URN (Uniform Resource Name) is an Internet resource with a name that, unlike a URL, has persistent significance - that is, the owner of the URN can expect that someone else (or a program) will always be able to find the resource.
URN (Uniform Resource Name) - A URN (Uniform Resource Name) is an Internet resource with a name that, unlike a URL, has persistent significance - that is, the owner of the URN can expect that someone else (or a program) will always be able to find the resource.
US Department of Health and Human Services (HHS) - The U.S.
USA Patriot Act - The USA Patriot Act is a law enacted in 2001, granting new and extended data-collection abilities to federal agencies in an effort to combat terrorism after the September 11 attacks.
USA Patriot Act - The USA Patriot Act is a law enacted in 2001, granting new and extended data-collection abilities to federal agencies in an effort to combat terrorism after the September 11 attacks.
usability - Also see human-computer interaction and graphical user interface.
usage-based pricing - Usage-based pricing is a consumption-based pricing model in which customers are only charged when they use a product or service.
USAPA - The USA Patriot Act is a law enacted in 2001, granting new and extended data-collection abilities to federal agencies in an effort to combat terrorism after the September 11 attacks.
USART (Universal Synchronous/Asynchronous Receiver/Transmitter) - A USART (Universal Synchronous/Asynchronous Receiver/Transmitter) is a microchip that facilitates communication through a computer's serial port using the RS-232C protocol.
USB - USB (Universal Serial Bus) is a plug-and-play interface between a computer and add-on devices, such as media players, keyboards, telephones, digital cameras, scanners, flash drives, joysticks and printers.
USB (Universal Serial Bus, USB 3.0, SuperSpeed USB) - USB (Universal Serial Bus) is a plug-and-play interface between a computer and add-on devices, such as media players, keyboards, telephones, digital cameras, scanners, flash drives, joysticks and printers.
USB 3 - USB (Universal Serial Bus) is a plug-and-play interface between a computer and add-on devices, such as media players, keyboards, telephones, digital cameras, scanners, flash drives, joysticks and printers.
USB 3 - USB 3.0, also known as SuperSpeed USB, is the next major revision of the Universal Serial Bus (USB).
USB 3.0 - USB (Universal Serial Bus) is a plug-and-play interface between a computer and add-on devices, such as media players, keyboards, telephones, digital cameras, scanners, flash drives, joysticks and printers.
USB 3.0 - USB 3.0, also known as SuperSpeed USB, is the next major revision of the Universal Serial Bus (USB).
USB 3.0 (SuperSpeed USB) - USB 3.0, also known as SuperSpeed USB, is the next major revision of the Universal Serial Bus (USB).
USB 30 - USB 3.0, also known as SuperSpeed USB, is the next major revision of the Universal Serial Bus (USB).
USB flash drive - A USB flash drive -- also known as a stick, thumb or pen drive -- is a plug-and-play portable storage device that uses flash memory and can attach to a keychain.
USB Killer - USB Killer is a device that connects to USB drives and delivers a surge which can damage or destroy unprotected hardware.
USB redirection (Universal Serial Bus redirection) - USB redirection lets end users plug peripheral devices into local USB ports and access them from virtual desktops.
USB-C (USB Type C) - USB-C is a connection type standard designed to replace all USB types on the computer and device ends of future USB with a single reversible connector.
USB3 - USB 3.0, also known as SuperSpeed USB, is the next major revision of the Universal Serial Bus (USB).
use case - A use case is a methodology used in system analysis to identify, clarify, and organize system requirements.
use case diagram (UML use case diagram) - A use case diagram is a way to summarize details of a system and the users within that system.
Usenet - Usenet is a collection of user-submitted notes or messages on various subjects that are posted to servers on a worldwide network.
user acceptance testing - In software development, user acceptance testing (UAT)—also called application testing, and end user testing—is a phase of software development in which the software is tested in the "real world" by the intended audience.
user acceptance testing (UAT) - In software development, user acceptance testing (UAT)—also called application testing, and end user testing—is a phase of software development in which the software is tested in the "real world" by the intended audience.
user account provisioning - User account provisioning is a business process for creating and managing access to resources in an information technology (IT) system.
user authentication - User authentication verifies the identity of a user attempting to gain access to a network or computing resource by authorizing a human-to-machine transfer of credentials during interactions on a network to confirm a user's authenticity.
user behavior analytics (UBA) - User behavior analytics (UBA) is a process in which security teams use monitoring tools to track, collect and assess the network activities of all individuals accessing those system to detect potentially malicious activity.
User Datagram Protocol - UDP (User Datagram Protocol) is a communications protocol that is primarily used for establishing low-latency and loss-tolerating connections between applications on the internet.
user engagement - User engagement is an assessment of an individual's response to some type of offering, such as a product, a service or a website.
user environment management (UEM) - User environment management is a technology designed to allow IT to oversee a user's complete desktop experience, including the profile, any policies IT applies and customizations the user makes.
user environment virtualization (UE virtualization) - User environment virtualization is the abstraction of personalized computer settings from their operating system and applications.
user exit - In computer software, a user exit is a place in a software program where a customer can arrange for their own tailor-made program to be called.
user group - In personal or business computing, a user group is a set of people who have similar interests, goals, or concerns.
user input device - A data glove is an interactive device, resembling a glove worn on the hand, which facilitates tactile sensing and fine-motion control in robotics and virtual reality.
user installed application - User installed applications (UIA) are programs that are installed on a computer by an end user, instead of by a corporate IT department.
user installed application (UIA) - User installed applications (UIA) are programs that are installed on a computer by an end user, instead of by a corporate IT department.
user interface - In a computer user interface, a workplace is a personalized view of a company and its processes that builds on the popular desktop metaphor.
user interface - The user interface (UI) is the point of human-computer interaction and communication in a device.
user interface (UI) - The user interface (UI) is the point of human-computer interaction and communication in a device.
User Interface Markup Language - UIML (User Interface Markup Language) is a descriptive language that lets you create a Web page that can be sent to any kind of interface device - for example, to a PC with a large display and a keyboard or to a "smart phone" with a tiny display and no keyboard.
user interface redressing - Clickjacking (also known as user-interface or UI redressing and IFRAME overlay) is an exploit in which malicious coding is hidden beneath apparently legitimate buttons or other clickable content on a website.
User Principal Name - In the Windows operating system's Active Directory, a User Principal Name (UPN) is the name of a system user in an e-mail address format.
User Principal Name (UPN) - In the Windows operating system's Active Directory, a User Principal Name (UPN) is the name of a system user in an e-mail address format.
user profile - In a Windows environment, a user profile is a record of user-specific data that define the user's working environment.
user script - A user script is programming that modifies the appearance or behavior of an application.
user self-provisioning - User self-provisioning, also known as cloud self-service, is a system that allows end users to set up and launch applications and services in a cloud computing environment without the direct intervention of an IT organization or a service provider.
user session - In tabulating statistics for Web site usage, a user session (sometime referred to as a visit) is the presence of a user with a specific IP address who has not visited the site recently (typically, anytime within the past 30 minutes).
user session (visit) - In tabulating statistics for Web site usage, a user session (sometime referred to as a visit) is the presence of a user with a specific IP address who has not visited the site recently (typically, anytime within the past 30 minutes).
user story - A user story is a tool used in Agile development to capture a description of a software feature from an end-user perspective.
user-generated content (UGC) - User-generated content (UGC) is the words and photos that unpaid contributors create and provide to publications, particularly Web properties.
user-interface redressing - Clickjacking (also known as user-interface or UI redressing and IFRAME overlay) is an exploit in which malicious coding is hidden beneath apparently legitimate buttons or other clickable content on a website.
USGCB (United States Government Configuration Baseline) - The United States Government Configuration Baseline, or USGCB, is a government-wide initiative that provides guidance on information security configuration best practices for IT products leveraged by federal agencies.
USSD - USSD (Unstructured Supplementary Service Data) is a GSM (Global System for Mobile) communications protocol that is used to send text messages.
USSD (Unstructured Supplementary Service Data) - USSD (Unstructured Supplementary Service Data) is a GSM (Global System for Mobile) communications protocol that is used to send text messages.
Ustream - Ustream is an online video service provider that enables anybody with a camera and Internet connection to conduct a live interactive video broadcast to a global audience from anywhere in the world.
UTC - Coordinated Universal Time (abbreviated as UTC, and therefore often spelled out as Universal Time Coordinated and sometimes as Universal Coordinated Time) is the standard time common to every place in the world.
UTF 16 - UTF-16 (16- bit Unicode Transformation Format) is a standard method of encoding Unicode character data.
UTF-16 - UTF-16 (16- bit Unicode Transformation Format) is a standard method of encoding Unicode character data.
UTF-16 (16- bit Unicode Transformation Format) - UTF-16 (16- bit Unicode Transformation Format) is a standard method of encoding Unicode character data.
utility - In computers, a utility is a small program that provides an addition to the capabilities provided by the operating system.
utility computing - Utility computing is a service provisioning model in which a service provider makes computing resources and infrastructure management available to the customer as needed, and charges them for specific usage rather than a flat rate.
utility storage - Utility storage is a service model in which a provider makes storage capacity available to an individual, an organization or a business unit on a pay-per-use basis.
UTM - Unified threat management (UTM) describes an information security (infosec) system that provides a single point of protection against threats, including viruses, worms, spyware and other malware, and network attacks.
UTP - Unshielded twisted pair (UTP) is a ubiquitous type of copper cabling used in telephone wiring and local area networks (LANs).
UUCP - UUCP (UNIX-to-UNIX Copy Protocol) is a set of UNIX programs for copying (sending) files between different UNIX systems and for sending commands to be executed on another system.
UUCP (UNIX-to-UNIX Copy Protocol) - UUCP (UNIX-to-UNIX Copy Protocol) is a set of UNIX programs for copying (sending) files between different UNIX systems and for sending commands to be executed on another system.
Uudecode - Uuencode (also called Uuencode/Uudecode) is a popular utility for encoding and decoding files exchanged between users or systems in a network.
Uuencode - Uuencode (also called Uuencode/Uudecode) is a popular utility for encoding and decoding files exchanged between users or systems in a network.
Uuencode (Uuencode/Uudecode) - Uuencode (also called Uuencode/Uudecode) is a popular utility for encoding and decoding files exchanged between users or systems in a network.
UUID - A UUID (Universal Unique Identifier) is a 128-bit number used to uniquely identify some object or entity on the Internet.
UUID (Universal Unique Identifier) - A UUID (Universal Unique Identifier) is a 128-bit number used to uniquely identify some object or entity on the Internet.
UWB - Ultra wideband (also known as UWB or as digital pulse wireless) is a wireless technology for transmitting large amounts of digital data over a wide spectrum of frequency bands with very low power for a short distance.
UX (user experience) - User experience (UX) encompasses all aspects of an end user's interaction with and attitude toward a given IT system or services, including the interface, graphics and design.
UX research - UX (user experience) research is the study of learning what end users of a system or product need and want, then employing those insights to enhance the design process for products, services or software.
UXGA - UXGA (Ultra Extended Graphics Array) is a display modein which the resolutionis 1600 pixels horizontally by 1200 pixels vertically (1600 x 1200).
UXGA (Ultra Extended Graphics Array) - UXGA (Ultra Extended Graphics Array) is a display modein which the resolutionis 1600 pixels horizontally by 1200 pixels vertically (1600 x 1200).
