Browse Definitions by Alphabet

U - UNI

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.
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.
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.
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 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 - 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 (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.
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.

UNI - UNS