Glossary Letter H
H - The henry (symbolized H) is the Standard International (SI) unit of inductance.
H-1B - H-1B is a United States Immigration Service visa classification that permits employers to hire highly skilled foreign workers who possess theoretical and practical application of a body of specialized knowledge.
H.245 - H.245 is a protocol for the transmission of call management and control signals in packet-based networks using H.
H.248 - Media Gateway Control Protocol (MGCP), also known as H.
H.264 - H.264, also known as MPEG-4 AVC (Advanced Video Coding), is a video compression standard that offers significantly greater compression than its predecessors.
H.264 (MPEG-4 AVC) - H.264, also known as MPEG-4 AVC (Advanced Video Coding), is a video compression standard that offers significantly greater compression than its predecessors.
H.323 - H.323 is a standard approved by the International Telecommunication Union (ITU) in 1996 to promote compatibility in videoconference transmissions over IP networks.
H.R. 744 - The I-SPY Act, formally known as the Internet Spyware Prevention Act of 2005 (H.
H/m - The henry per meter (symbolized H/m) is the unit of magnetic permeability in the International System of Units (SI).
h2g2 - In Douglas Adams' "The Hitchhiker's Guide to the Galaxy," 42 is the number from which all meaning ("the meaning of life, the universe, and everything") can be derived.
HA - In information technology, high availability refers to a system or component that is continuously operational for a desirably long length of time.
HA storage (high-availability storage) - High-availability storage (HA storage) is a storage system that is continuously operational or provides at least 99% uptime.
HaaS - Hardware as a Service (HaaS) is a service provision model for hardware that is defined differently in managed services and grid computing contexts.
hackathon - A hackathon, also known as a codefest, is a social coding event that brings computer programmers and other interested people together to improve upon or build a new software program.
hacker - A hacker is an individual who uses computer, networking or other skills to overcome a technical problem.
hacking as a service (HaaS) - Hacking as a service (HaaS) is the commercialization of hacking skills, in which the hacker serves as a contractor.
hacktivism - Hacktivism is the act of hacking, or breaking into a computer system, for a politically or socially motivated purpose.
hacktivist - Hacktivism is the act of hacking, or breaking into a computer system, for a politically or socially motivated purpose.
Hadoop - Hadoop is an open source distributed processing framework that manages data processing and storage for big data applications running in clustered systems.
Hadoop 2 - Apache Hadoop 2 is the second iteration of the Hadoop framework for distributed data processing.
Hadoop as a service (HaaS) - Hadoop as a service (HaaS), also known as Hadoop in the cloud, is a big data analytics framework that stores and analyzes data in the cloud using Hadoop.
Hadoop cluster - A Hadoop cluster is a special type of computational cluster designed specifically for storing and analyzing huge amounts of unstructured data in a distributed computing environment.
Hadoop data lake - A Hadoop data lake is a data management platform comprising one or more Hadoop clusters.
Hadoop Distributed File System (HDFS) - The Hadoop Distributed File System (HDFS) is the primary data storage system used by Hadoop applications.
haiku error message - A haiku error message is a poem in the Japanese form on a page advising the user that an Internet problem, such as a 404 error, means that their request cannot be satisfied.
HailStorm - Part of Microsoft's .
hairpin - In general telecommunication, hairpinning is returning a message from an origin endpoint back in the direction it came from as a way to get it to its destination endpoint.
hairpinning - In general telecommunication, hairpinning is returning a message from an origin endpoint back in the direction it came from as a way to get it to its destination endpoint.
hakspeak - Leet speak, also known as simply leet, is the substitution of a word's letters with numbers or special characters.
HAL - In computers, a hardware abstraction layer (HAL) is a layer of programming that allows a computer operating system to interact with a hardware device at a general or abstract level rather than at a detailed hardware level.
half duplex - Half-duplex data transmission means that data can be transmitted in both directions on a signal carrier, but not at the same time.
half life - In science, a half-life (also, as a noun, spelled half life) is the amount of time it takes for half of a substance or entity to undergo some specified process.
half-duplex - Half-duplex data transmission means that data can be transmitted in both directions on a signal carrier, but not at the same time.
half-life - In science, a half-life (also, as a noun, spelled half life) is the amount of time it takes for half of a substance or entity to undergo some specified process.
half-open scanning - SYN scanning is a tactic that a malicious hacker (or cracker) can use to determine the state of a communications port without establishing a full connection.
Hall effect - The Hall effect is the movement of charge carriers through a conductor towards a magnetic attraction.
Halloween II: Do you speak -- eek! -- Geek? - A WhatIs.com tech quiz with a Halloween theme: Does Nightmare Freddie of Elm Street fame use one of these for manicures? It's a type of space-saving server for a single, dedicated application.
Halloween: Do you speak geek? - A tech trivia quiz with a Halloween theme: White words on a blue background: your system has crashed.
HALO - A HALO (High Altitude Long Operation) aircraft is an aircraft designed to act as a very high altitude receiving and transmitting tower, circling a metropolitan area and providing broadband telecommunication service at data rates up to 5 Mbps to homes and up to 25 Mbps to business users with dedicated lines.
HALO (High Altitude Long Operation) - A HALO (High Altitude Long Operation) aircraft is an aircraft designed to act as a very high altitude receiving and transmitting tower, circling a metropolitan area and providing broadband telecommunication service at data rates up to 5 Mbps to homes and up to 25 Mbps to business users with dedicated lines.
halo effect - The halo effect is a form of cognitive bias which causes one part to make the whole seem more attractive or desirable.
Halogen Software Inc. - Halogen Software Inc.
ham - Email spam, or junk email, is unsolicited bulk messages sent through email with commercial, fraudulent or malicious intent.
ham radio - Amateur radio, also known as ham radio, is a hobby enjoyed by several hundred thousand people in the United States and by over a million people worldwide.
hamburger icon (slide drawer navigation) - The hamburger icon got its name because it resembles a burger in a bun.
Hamming code - Hamming code is a set of error-correction codes that can be used to detect and correct bit errors that can occur when computer data is moved or stored.
HANA - SAP HANA is a data warehouse appliance for processing high volumes of operational and transactional data in real-time.
handheld - A handie talkie, often referred to by its abbreviation, HT, is a handheld, portable two-way radio transceiver.
handheld - A handheld computer is a computer that can conveniently be stored in a pocket (of sufficient size) and used while you're holding it.
Handheld Device Markup Language - HDML (Handheld Device Markup Language) - often compared to Wireless Markup Language (WML) - is a language that allows the text portions of Web pages to be presented on cellular telephones and personal digital assistants (PDA) via wireless access.
handheld keyboard - A portable keyboard (or handheld keyboard) is one that is designed to be used with wireless devices, such as personal digital assistants (PDAs) and smartphones.
handie talkie - A handie talkie, often referred to by its abbreviation, HT, is a handheld, portable two-way radio transceiver.
handie talkie (HT, walkie talkie, handheld) - A handie talkie, often referred to by its abbreviation, HT, is a handheld, portable two-way radio transceiver.
Handle to Registry Key - Handle to Registry Key (HKEY) is a typedef supplied in the Windows headers files.
Handle to Registry Key (HKEY) - Handle to Registry Key (HKEY) is a typedef supplied in the Windows headers files.
handoff - In a cellular telephone network, handoff is the transition for any given user of signal transmission from one base station to a geographically adjacent base station as the user moves around.
hands-off infrastructure management - Hands-off infrastructure management is the remote, automated administration of server, storage and network resources.
handshake - In telephone communication, handshaking is the exchange of information between two modems and the resulting agreement about which protocol to use that precedes each telephone connection.
handshaking - In telephone communication, handshaking is the exchange of information between two modems and the resulting agreement about which protocol to use that precedes each telephone connection.
Handspring - Handspring was a company that manufactured portable computer/organizer hardware.
handtop - A handtop is a full-featured portable computer that is slightly larger than a PDA, but much smaller than a laptop.
handtop (ultra personal computer) - A handtop is a full-featured portable computer that is slightly larger than a PDA, but much smaller than a laptop.
hang - A hangup, also called a hang, is a condition that sometimes occurs when computer programs conflict or do not run properly.
hangup - A hangup, also called a hang, is a condition that sometimes occurs when computer programs conflict or do not run properly.
hangup (or hang) - A hangup, also called a hang, is a condition that sometimes occurs when computer programs conflict or do not run properly.
happy path testing - Happy-path testing is a type of software testing that uses known input and produces an expected output.
HAProxy - HAProxy (High Availability Proxy), developed by HAProxy Technologies LLC, is an open source load balancer proxy for TCP and HTTP applications.
haptics - Haptics (pronounced HAP-tiks) is the science of applying touch (tactile) sensation and control to interaction with computer applications.
hard bounce - A hard bounce is an e-mail message that has been returned to the sender because the recipient's address is invalid.
hard copy - A hard copy (or "hardcopy") is a printed copy of information from a computer.
hard copy (printout) - A hard copy (or "hardcopy") is a printed copy of information from a computer.
hard disk - A hard disk is part of a unit -- often called a disk drive, hard drive or hard disk drive -- that stores and provides relatively quick access to large amounts of data on an electromagnetically charged surface or set of surfaces.
hard disk drive - Hard disk drives are a type of physical storage media that use spinning disk platters to store nonsequential data in personal computers and enterprise data centers.
hard disk drive (HDD) - A computer hard disk drive (HDD) is a non-volatile memory hardware device that controls the positioning, reading and writing of the hard disk, which furnishes data storage.
hard drive - Hard disk drives are a type of physical storage media that use spinning disk platters to store nonsequential data in personal computers and enterprise data centers.
hard drive overwrite - In e-cycling, a hard drive overwriter is a program or utility that repeatedly overwrites the data on a computer's hard drive with gibberish.
hard drive overwriter - In e-cycling, a hard drive overwriter is a program or utility that repeatedly overwrites the data on a computer's hard drive with gibberish.
hard drive shredder - A hard drive shredder is a mechanical device that physically destroys old hard drives in such a way that the data they contain cannot be recovered.
hard error - A hard error is an issue in RAM that results from a permanent physical flaw in the module caused by a hardware failure or defect.
hard phone - A softphone (software telephone) is an application program that enables voice over Internet Protocol (VoIP) telephone calls from computing devices.
hard real time system - A hard real-time system (also known as an immediate real-time system) is hardware or software that must operate within the confines of a stringent deadline.
hard real-time system - A hard real-time system (also known as an immediate real-time system) is hardware or software that must operate within the confines of a stringent deadline.
hard real-time system (immediate real-time system) - A hard real-time system (also known as an immediate real-time system) is hardware or software that must operate within the confines of a stringent deadline.
hard reset (factory reset; master reset) - A hard reset, also known as a factory reset or master reset, is the restoration of a device, such as a smartphone or tablet, to its state when it left the factory.
hard skills - Hard skills are specific abilities, or capabilities, that an individual can possess and demonstrate in a measured way.
hard zoning - Hard zoning is used to allocate resources and control access in a storage-area network (SAN).
hard-drive encryption - Hard-drive encryption is a technology that encrypts the data stored on a hard drive using sophisticated mathematical functions.
hardcode - In computer programming or text markup, to hardcode (less frequently, hard code) is to use an explicit rather than a symbolic name for something that is likely to change at a later time.
hardphone - A softphone (software telephone) is an application program that enables voice over Internet Protocol (VoIP) telephone calls from computing devices.
Hardware 101 - Test yourself.
hardware abstraction layer - In computers, a hardware abstraction layer (HAL) is a layer of programming that allows a computer operating system to interact with a hardware device at a general or abstract level rather than at a detailed hardware level.
hardware abstraction layer (HAL) - In computers, a hardware abstraction layer (HAL) is a layer of programming that allows a computer operating system to interact with a hardware device at a general or abstract level rather than at a detailed hardware level.
Hardware as a Service - Hardware as a Service (Haas), in a grid computing context, is a pay-as-you-go model for accessing a provider's infrastructure and CPU power.
Hardware as a Service - Hardware-as-a-service (HaaS) is a procurement model that is similar to leasing or licensing.
Hardware as a Service - Hardware as a Service (HaaS) is a service provision model for hardware that is defined differently in managed services and grid computing contexts.
Hardware as a Service (HaaS) - Hardware as a Service (HaaS) is a service provision model for hardware that is defined differently in managed services and grid computing contexts.
Hardware as a Service (in grid computing) - Hardware as a Service (Haas), in a grid computing context, is a pay-as-you-go model for accessing a provider's infrastructure and CPU power.
hardware clustering - Hardware clustering (sometimes called operating system clustering) is a hardware-based method of turning multiple servers into a cluster (a group of servers that acts like a single system).
hardware emulation - Hardware emulation is the use of one hardware device to mimic the function of another hardware device.
hardware load balancing device - A hardware load-balancing device (HLD), also known as a layer 4-7 router, is a physical unit that directs computers to individual servers in a network, based on factors such as server processor utilization, the number of connections to a server, or the overall server performance.
hardware load-balancing device - A hardware load-balancing device (HLD), also known as a layer 4-7 router, is a physical unit that directs computers to individual servers in a network, based on factors such as server processor utilization, the number of connections to a server, or the overall server performance.
hardware load-balancing device (HLD) - A hardware load-balancing device (HLD), also known as a layer 4-7 router, is a physical unit that directs computers to individual servers in a network, based on factors such as server processor utilization, the number of connections to a server, or the overall server performance.
hardware RAID (hardware redundant array of independent disk) - Hardware RAID is a form of RAID where processing is done externally.
hardware security - Hardware security is vulnerability protection that comes in the form of a physical device rather than software that is installed on the hardware of a computer system.
hardware security module (HSM) - A hardware security module (HSM) is a physical device that provides extra security for sensitive data.
hardware virtualization - Hardware virtualization, which is also known as server virtualization or simply virtualization, is the abstraction of computing resources from the software that uses those resources.
hardware VPN - A hardware VPN is a virtual private network ( VPN) based on a single, stand-alone device.
hardware vulnerability - A hardware vulnerability is an exploitable weakness in a computer system that enables attack through remote or physical access to system hardware.
hardware-as-a-service (in managed services) - Hardware-as-a-service (HaaS) is a procurement model that is similar to leasing or licensing in which hardware that belongs to a managed service provider (MSP) is installed at a customer's site and a service level agreement (SLA) defines the responsibilities of both parties.
hardware-assisted virtualization - Hardware-assisted virtualization is the use of a computer's physical components to support the mechanism that abstracts and manages the computer's underlying resources from its operating system and the applications that run on it.
harmonic - A harmonic is a signal or wave whose frequency is an integral (whole-number) multiple of the frequency of some reference signal or wave.
Hartree energy - The Hartree energy is a physical constant equal to twice the binding energy of the electron in the ground state (the lowest-energy state) of the hydrogen atom.
hash - Hashing is the transformation of a string of characters into a usually shorter fixed-length value or key that represents the original string.
Hash based Message Authentication Code - Hash-based Message Authentication Code (HMAC) is a message authentication code that uses a cryptographic key in conjunction with a hash function.
hash function - Hashing is the transformation of a string of characters into a usually shorter fixed-length value or key that represents the original string.
Hash-based Message Authentication Code - Hash-based Message Authentication Code (HMAC) is a message authentication code that uses a cryptographic key in conjunction with a hash function.
Hash-based Message Authentication Code (HMAC) - Hash-based Message Authentication Code (HMAC) is a message authentication code that uses a cryptographic key in conjunction with a hash function.
HashiCorp - HashiCorp is a software company that provides a suite of modular DevOps infrastructure provisioning and management products.
hashing - Hashing is the transformation of a string of characters into a usually shorter fixed-length value or key that represents the original string.
hashtag - A hashtag is atag used to categorize posts on Twitter (tweets) according to topics.
Haswell - Haswell is the code name for Intel's 4th generation Core i-based processors.
hate speech - Hate speech is a verbal or written communication expressing a generalized negative opinion about a particular demographic, sometimes attacking an individual as a member of that group.
HAVA - The Help America Vote Act of 2002 (HAVA)is a federal program that reformed aspects of the United States election system.
HAVA (Help America Vote Act of 2002) - The Help America Vote Act of 2002 (HAVA)is a federal program that reformed aspects of the United States election system.
Have I Been Pwned (HIBP) - Have I Been Pwned (HIBP) is a website that allows users to search and find out if an email address’s password has been compromised.
HAVi - HAVi (Home Audio Visual) is a standard, developed by several leading electronics and computer manufacturers, that allows a number of different home-entertainment and communication devices to operate from a single controller device such as your TV set.
HAVi (Home Audio Visual) - HAVi (Home Audio Visual) is a standard, developed by several leading electronics and computer manufacturers, that allows a number of different home-entertainment and communication devices to operate from a single controller device such as your TV set.
Hawthorne effect - The Hawthorne effect is the modification of behavior by study participants in response to their knowledge that they are being observed or singled out for special treatment.
Hayes command set - Hayes command set is a specific programming language originally developed for the Hayes Smartmodem 300 baud modem during the late 1970s.
HBA - A host bus adapter (HBA) provides physical connectivity and input/output between a server and a network and/or storage device.
HC3 (HyperCore 3) - HC3 (HyperCore 3) is a hyper-converged appliance from Scale Computing.
HCCA (Health Care Compliance Association) - The Health Care Compliance Association (HCCA) is a nonprofit, individual membership organization that aims to help health care professionals with ethics and compliance.
HCI - HCI (human-computer interaction) is the study of how people interact with computers and to what extent computers are or are not developed for successful interaction with human beings.
HCI (human-computer interaction) - HCI (human-computer interaction) is the study of how people interact with computers and to what extent computers are or are not developed for successful interaction with human beings.
HD down converter - An HD (high-definition) downconverter is a device that converts high-definition television (HDTV) video to standard-definition video that can be viewed on conventional television (TV) receivers or computer monitors, or recorded on DVD.
HD downconverter - An HD (high-definition) downconverter is a device that converts high-definition television (HDTV) video to standard-definition video that can be viewed on conventional television (TV) receivers or computer monitors, or recorded on DVD.
HD downconverter (high-definition downconverter) - An HD (high-definition) downconverter is a device that converts high-definition television (HDTV) video to standard-definition video that can be viewed on conventional television (TV) receivers or computer monitors, or recorded on DVD.
HD DVD - HD-DVD (high-density DVD) is an optical digital storage medium with a capacity that far exceeds that of standard DVD media.
HD ROM - HD-ROM (High-Density - Read Only Memory) is a high-capacity storage technology developed at Norsam Technologies in conjunction with an IBM research group that enables a disk to store hundreds of times as much information as a CD-ROM.
HD 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.
HD 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.
HD upconverter (high-definition 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.
HD-DVD - HD-DVD (high-density DVD) is an optical digital storage medium with a capacity that far exceeds that of standard DVD media.
HD-DVD (high-density DVD) - HD-DVD (high-density DVD) is an optical digital storage medium with a capacity that far exceeds that of standard DVD media.
HD-ROM - HD-ROM (High-Density - Read Only Memory) is a high-capacity storage technology developed at Norsam Technologies in conjunction with an IBM research group that enables a disk to store hundreds of times as much information as a CD-ROM.
HD-ROM (High-Density - Read Only Memory) - HD-ROM (High-Density - Read Only Memory) is a high-capacity storage technology developed at Norsam Technologies in conjunction with an IBM research group that enables a disk to store hundreds of times as much information as a CD-ROM.
HD-SDI downconverter - An HD (high-definition) downconverter is a device that converts high-definition television (HDTV) video to standard-definition video that can be viewed on conventional television (TV) receivers or computer monitors, or recorded on DVD.
HDCD - HDCD (High Definition Compatible Digital) is a digital encoding and decoding process for compact disc and DVD audio recording.
HDCD (High Definition Compatible Digital) - HDCD (High Definition Compatible Digital) is a digital encoding and decoding process for compact disc and DVD audio recording.
HDCP - HDCP (High-bandwidth Digital Content Protection) is a specified method from Intel for protecting copyrighted digital entertainment content that uses the Digital Video Interface (DVI) by encrypting its transmission between the video source and the digital display (receiver).
HDCP (High-bandwidth Digital Content Protection) - HDCP (High-bandwidth Digital Content Protection) is a specified method from Intel for protecting copyrighted digital entertainment content that uses the Digital Video Interface (DVI) by encrypting its transmission between the video source and the digital display (receiver).
HDD - Hard disk drives are a type of physical storage media that use spinning disk platters to store nonsequential data in personal computers and enterprise data centers.
HDD form factor (hard disk drive form factor) - HDD form factor is the size or geometry of a hard disk drive, determining the device’s compatibility with the drive bays in a storage array or enclosure, server, portable computer or other computing device.
HDLC - HDLC (High-level Data Link Control) is a group of protocols or rules for transmitting data between network points (sometimes called nodes).
HDLC (High-level Data Link Control) - HDLC (High-level Data Link Control) is a group of protocols or rules for transmitting data between network points (sometimes called nodes).
HDMI - HDMI (High-Definition Multimedia Interface) is an industry standard for creating audio and video connections between high-definition electronic devices.
HDMI - HDMI (High Definition Multimedia Interface) is a specification that combines video and audio into a single digital interface for use with digital versatile disc (DVD) players, digital television (DTV) players, set-top boxes, and other audiovisual devices.
HDMI (High-Definition Multimedia Interface) - HDMI (High-Definition Multimedia Interface) is an industry standard for creating audio and video connections between high-definition electronic devices.
HDML - HDML (Handheld Device Markup Language) - often compared to Wireless Markup Language (WML) - is a language that allows the text portions of Web pages to be presented on cellular telephones and personal digital assistants (PDA) via wireless access.
HDML (Handheld Device Markup Language) - HDML (Handheld Device Markup Language) - often compared to Wireless Markup Language (WML) - is a language that allows the text portions of Web pages to be presented on cellular telephones and personal digital assistants (PDA) via wireless access.
HDSL - Also see our Fast guide to DSL.
HDSL (High bit-rate Digital Subscriber Line) - Also see our Fast guide to DSL.
HDTV - HDTV (high definition television) is a television display technology that provides picture quality similar to 35 mm.
HDTV (high definition television) - HDTV (high definition television) is a television display technology that provides picture quality similar to 35 mm.
HDTV downconverter - An HD (high-definition) downconverter is a device that converts high-definition television (HDTV) video to standard-definition video that can be viewed on conventional television (TV) receivers or computer monitors, or recorded on DVD.
HDX - Citrix HDX technology is a set of capabilities that work together to deliver a high-definition user experience of virtual desktops and applications to any device over any network from the data center.
head tracking - Head tracking is a software application that monitors a user’s head position and orientation.
head-end - A cable head-end (or headend) is the facility at a local cable TV office that originates and communicates cable TV services and cable modem services to subscribers.
headend - A cable head-end (or headend) is the facility at a local cable TV office that originates and communicates cable TV services and cable modem services to subscribers.
header - In information technology, a header is, in general, something that goes in front of something else and is usually repeated as a standard part of the units of something else.
headless Android - Headless Android is a version of the Android operating system designed for embedded devices that lack user interfaces.
headless CMS (headless content management system) - A headless content management system (CMS) delivers back-end capabilities for editing, organizing and storing all types of digital information, without regard to how that content is published, displayed or used.
headless commerce (headless e-commerce) - Headless commerce, also called headless e-commerce, is a platform architecture that decouples the front end of an e-commerce website with the back end.
headless server - A headless server is a computing device without a local interface that is dedicated to providing services to other computers and their users.
headless system - A headless system is a computer that operates without a monitor, graphical user interface (GUI) or the typical peripherals used to control it, such as a keyboard and mouse.
headroom - Attenuation-to-crosstalk ratio (ACR), also called headroom, is the difference, expressed as a figure in decibels (dB), between the signal attenuation produced by a wire or cable transmission medium and the near-end crosstalk (NEXT).
heads-up display (HUD) - A heads-up display (HUD) is a transparent or miniaturized display technology that does not require users to shift their gaze from where they are naturally looking.
Health Alert Network - Health Alert Network (HAN) is the early warning system run by the Center for Disease Control (CDC).
Health and Human Services�(HHS) - The U.S.
health apps - Health apps are application programs that offer health-related services for smartphones and tablet PCs.
health care cloud - A health care cloud is a cloud computing service used by health care providers for storing, maintaining and backing up personal heath information (PHI).
Health Data Repository - Clinical Data Repository/Health Data Repository (CHDR) is a storage interface between the data repositories of the Department of Defense and the Veterans Administration.
Health Indicator Warehouse - The Health Indicators Warehouse (HIW) is a national database of measurable characteristics that describe statistical aspects of health, causal factors of health or health issues, accessibility and use of healthcare, all of which are considered health indicators.
health informatics - Health informatics is the practice of acquiring, studying and managing health data and applying medical concepts in conjunction with health information technology systems to help clinicians provide better healthcare.
health information exchange - Health information exchange (HIE) is the electronic transmission of healthcare-related data among medical facilities, health information organizations -- companies that oversee and govern the exchange of this data -- and government agencies according to national standards.
Health Information Exchange (HIE) - Health information exchange (HIE) is the electronic transmission of healthcare-related data among medical facilities, health information organizations -- companies that oversee and govern the exchange of this data -- and government agencies according to national standards.
Health Information Technology for Economic and Clinical Health Act - The HITECH (Health Information Technology for Economic and Clinical Health) Act of 2009 is legislation that was created to stimulate the adoption of electronic health records (EHR) and the supporting technology in the United States.
Health Insurance Portability and Accountability Act - HIPAA (Health Insurance Portability and Accountability Act of 1996) is United States legislation that provides data privacy and security provisions for safeguarding medical information.
Health IT - Health IT (health information technology) is the area of IT involving the design, development, creation, use and maintenance of information systems for the healthcare industry.
Health IT (health information technology) - Health IT (health information technology) is the area of IT involving the design, development, creation, use and maintenance of information systems for the healthcare industry.
Healthcare CIO (healthcare chief information officer) - A healthcare CIO is a healthcare executive with an influence over technology purchasing and other IT business decisions.
Healthcare Information and Management Systems Society - The Healthcare Information and Management Systems Society (HIMSS) is a nonprofit organization whose goal is to promote the best use of information technology and management systems in the health care industry.
Heap - Heap is a user analytics tool which can be utilized to capture all web, mobile and cloud-based user interactions in an application.
heap - In certain programming languages including C and Pascal, a heap is an area of pre-reserved computer main storage (memory) that a program process can use to store data in some variable amount that won't be known until the program is running.
hearables - Hearables are wireless wearable computing earpieces that enable voice input and return results audibly to the user’s ear.
Heartbeat - Heartbeat is a program that runs specialized scripts automatically whenever a system is initialized or rebooted.
Heartbleed - Heartbleed is a vulnerability in some implementations of OpenSSL.
heat - Heat is the transfer of kinetic energy from one medium or object to another, or from an energy source to a medium or object.
heat bed - A heat bed is an additional module for a 3D printer that makes the cooling process of 3D printed materials more controlled, for better results.
heat map - A heat map is a two-dimensional representation of data in which values are represented by colors.
heat map (heatmap) - A heat map is a two-dimensional representation of data in which values are represented by colors.
heat maps - Data visualization is a graphical representation of numerical data.
heat pump - A heat pump is a device that takes heat from one source and moves it to another location through electric or mechanical means.
heat sink - A heatsink is a device that is attached to a microprocessor chip to keep it from overheating by absorbing its heat and dissipating it into the air.
heating ventilation air conditioning - HVAC stands for heating, ventilation, and air conditioning.
Heating, Refrigerating, and Air Conditioning Engineers - ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) is an organization devoted to the advancement of indoor-environment-control technology in the heating, ventilation and air conditioning (HVAC) industry.
heating, ventilation, and air conditioning - HVAC stands for heating, ventilation, and air conditioning.
heatmap - A heat map is a two-dimensional representation of data in which values are represented by colors.
heatset - Heatset web offset printing is a printing process in which ink is dried rapidly by forced-air heating.
heatset Web offset printing - Heatset web offset printing is a printing process in which ink is dried rapidly by forced-air heating.
heatsink - A heatsink is a device that is attached to a microprocessor chip to keep it from overheating by absorbing its heat and dissipating it into the air.
heavy Internet use - Technology addiction (Internet addiction) is an impulse control disorder that involves the obsessive use of mobile devices, the internet or video games despite negative consequences to the user of the technology.
heavyweight thread - In computer programming, a thread is an instance of a sequence of code that is operating as a unit, typically on behalf of a single user, transaction, or message.
Heisenberg indeterminancy 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.
helical antenna - A helical antenna is a specialized antenna that emits and responds to electromagnetic fields with rotating (circular)polarization.
helical scan - Helical scan is a way of recording information onto magnetic tape.
helium hard drive - A helium drive is a hard disk that exploits the characteristic lightness of that gas to increase the medium’s potential speed and storage density.
HELLO packet - In the Open Shortest Path First (OSPF) communications protocol - which enables network routers to share information with each other, a HELLO packet is a special packet (message) that is sent out periodically from a router to establish and confirm network adjacency relationships.
Hello World - Hello World is a simple program that, when run, displays the message: Hello World.
Help America Vote Act of 2002 - The Help America Vote Act of 2002 (HAVA)is a federal program that reformed aspects of the United States election system.
help application - In certain earlier versions of Netscape and perhaps other Web browser, a helper application is a program that can be designated to handle a particular file type that the browser has received.
help desk - In a business enterprise, a help desk is a place that a user of information technology can call to get help with a problem.
help file - A help system (sometimes called a help file) is a documentation component of a software program that explains the features of the program and helps the user understand its capabilities.
help system - A help system (sometimes called a help file) is a documentation component of a software program that explains the features of the program and helps the user understand its capabilities.
help system (help file) - A help system (sometimes called a help file) is a documentation component of a software program that explains the features of the program and helps the user understand its capabilities.
henry - The henry (symbolized H) is the Standard International (SI) unit of inductance.
henry (H) - The henry (symbolized H) is the Standard International (SI) unit of inductance.
henry per meter - The henry per meter (symbolized H/m) is the unit of magnetic permeability in the International System of Units (SI).
henry per meter (H/m) - The henry per meter (symbolized H/m) is the unit of magnetic permeability in the International System of Units (SI).
Herman Hollerith - Born in 1860 in Buffalo, NY, Herman Hollerith was the creator of the Hollerith Electric Tabulating System, the ancestor to computers as we know them today.
Heroku - Heroku is a cloud-based development platform as a service (PaaS) provider.
hertz - Hertz is a unit of frequency (of change in state or cycle in a sound wave, alternating current, or other cyclical waveform) of one cycle per second.
heterogeneous - Heterogeneous (pronounced HEH-tuh-roh-DJEEN-ee-uhs, from the Greek heteros or "other" and genos or "kind") is the characteristic of containing dissimilar constituents.
heuristic - As an adjective, heuristic (pronounced hyu-RIS-tik and from the Greek "heuriskein" meaning "to discover") pertains to the process of gaining knowledge or some desired result by intelligent guesswork rather than by following some preestablished formula.
Hewlett Packard - HP (Hewlett-Packard) is a prominent IT company based in Palo Alto, California.
Hewlett Packard Enterprise (HP Enterprise, HPE) - Hewlett Packard Enterprise (HP Enterprise, also known as HPE) is an American multinational company that specializes in business IT (information technology).
Hewlett-Packard - HP (Hewlett-Packard) is a prominent IT company based in Palo Alto, California.
Hewlett-Packard (HP) - HP (Hewlett-Packard) is a prominent IT company based in Palo Alto, California.
hexadecimal - Hexadecimal describes a base-16 number system.
HFC - A hybrid fiber coaxial (HFC) network is a telecommunication technology in which optical fiber cable and coaxial cable are used in different portions of a network to carry broadband content (such as video, data, and voice).
HFC network - A hybrid fiber coaxial (HFC) network is a telecommunication technology in which optical fiber cable and coaxial cable are used in different portions of a network to carry broadband content (such as video, data, and voice).
HHD - A hybrid hard drive (HHD), sometimes known as a solid-state hybrid drive (SSHD), is a mass storage device that combines a conventional hard disk drive and a NAND flash module.
HHR - A hybrid health record (HHR) is documentation of an individual's health information that is tracked in multiple formats and stored in multiple places.
HHS - The U.S.
HI MEMS cyborg insects - The Hybrid Insect Micro-Electro-Mechanical Systems (HI-MEMS) program, also known as the cybug program, is a proposal from the Defense Advanced Research Projects Agency (DARPA) to encourage the development of cyborg insects that can be controlled by humans.
HI-MEMS cyborg insects - The Hybrid Insect Micro-Electro-Mechanical Systems (HI-MEMS) program, also known as the cybug program, is a proposal from the Defense Advanced Research Projects Agency (DARPA) to encourage the development of cyborg insects that can be controlled by humans.
HI-MEMS cyborg insects (Hybrid Insect Micro-Electro-Mechanical Systems) - The Hybrid Insect Micro-Electro-Mechanical Systems (HI-MEMS) program, also known as the cybug program, is a proposal from the Defense Advanced Research Projects Agency (DARPA) to encourage the development of cyborg insects that can be controlled by humans.
Hibernate - Hibernate is an open source object relational mapping (ORM) framework designed to facilitate the creation of database-oriented Java web applications.
hibernation - Hibernation is a mode in which a computer is turned off but saves its state to resume when it is turned on again.
hiccup - In information technology, hiccup is an informal term for a non-recurring problem of indeterminate cause that usually does not cause a significant disruption of work or activity.
Hick's law - Hick's law is a psychological principle which states that the more options are available to a person, the longer it will take for him or her to make a decision about which option is best.
hidden Internet - Deep Web content includes email messages, chat messages, private content on social media sites, electronic bank statements, electronic health records and other content that is accessible over the Internet but is not crawled and indexed by search engines.
HIDS - Host intrusion detection systems (HIDS) and network intrusion detection systems (NIDS) are methods of security management for computers and networks.
HIDS NIDS - Host intrusion detection systems (HIDS) and network intrusion detection systems (NIDS) are methods of security management for computers and networks.
HIDS/NIDS (host intrusion detection systems and network intrusion detection systems) - Host intrusion detection systems (HIDS) and network intrusion detection systems (NIDS) are methods of security management for computers and networks.
HIE - Health information exchange (HIE) is the electronic transmission of healthcare-related data among medical facilities, health information organizations -- companies that oversee and govern the exchange of this data -- and government agencies according to national standards.
hierarchical corporate culture - A hierarchical corporate culture is an organizational model based on clearly defined corporate levels and structures.
hierarchical menu - A hierarchical menu is a multi-level arrangement of options, organized to allow users to find information, tools, or functions more easily than they could in an unstructured presentation.
Hierarchical Mobile IPv6 - Hierarchical Mobile IPv6 (HMIPv6) is the proposed enhancement of Mobile Internet Protocol versions 6 (MIPv6) that is designed to reduce the amount of signaling required and to improve handoffspeed for mobile connections.
Hierarchical Mobile IPv6 (HMIPv6) - Hierarchical Mobile IPv6 (HMIPv6) is the proposed enhancement of Mobile Internet Protocol versions 6 (MIPv6) that is designed to reduce the amount of signaling required and to improve handoffspeed for mobile connections.
Hierarchical Storage Management - HSM (Hierarchical Storage Management) is policy-based management of file backup and archiving in a way that uses storage devices economically and without the user needing to be aware of when files are being retrieved from backup storage media.
hierarchy - A hierarchy is an organizational structure in which items are ranked according to levels of importance.
Higgins Project - The Higgins Trust Framework (HTF) is an API (application program interface) that allows end users to store identity information in locations of their choice and share portions of that information anonymously with online vendors and service providers in a controlled manner.
Higgins Trust Framework - The Higgins Trust Framework (HTF) is an API (application program interface) that allows end users to store identity information in locations of their choice and share portions of that information anonymously with online vendors and service providers in a controlled manner.
High Altitude Long Operation - A HALO (High Altitude Long Operation) aircraft is an aircraft designed to act as a very high altitude receiving and transmitting tower, circling a metropolitan area and providing broadband telecommunication service at data rates up to 5 Mbps to homes and up to 25 Mbps to business users with dedicated lines.
High Availability - VMware vSphere HA (High Availability) is a utility included in VMware's vSphere software that can restart failed virtual machines (VMs) on alternative host servers to reduce application downtime.
high availability - In information technology, high availability refers to a system or component that is continuously operational for a desirably long length of time.
high availability (HA) - High availability (HA) is the ability of a system to operate continuously without failing for a designated period of time.
high availability cluster (HA cluster) - A high availability cluster is a group of hosts that act like a single system and provide continuous uptime.
High bandwidth Digital Content Protection - HDCP (High-bandwidth Digital Content Protection) is a specified method from Intel for protecting copyrighted digital entertainment content that uses the Digital Video Interface (DVI) by encrypting its transmission between the video source and the digital display (receiver).
High bit rate Digital Subscriber Line - Also see our Fast guide to DSL.
High bit-rate Digital Subscriber Line - Also see our Fast guide to DSL.
High bit-rate DSL - Also see our Fast guide to DSL.
High Definition Compatible Digital - HDCD (High Definition Compatible Digital) is a digital encoding and decoding process for compact disc and DVD audio recording.
high definition downconverter - An HD (high-definition) downconverter is a device that converts high-definition television (HDTV) video to standard-definition video that can be viewed on conventional television (TV) receivers or computer monitors, or recorded on DVD.
High Definition Multimedia Interface - HDMI (High Definition Multimedia Interface) is a specification that combines video and audio into a single digital interface for use with digital versatile disc (DVD) players, digital television (DTV) players, set-top boxes, and other audiovisual devices.
High Definition Multimedia Interface - HDMI (High-Definition Multimedia Interface) is an industry standard for creating audio and video connections between high-definition electronic devices.
high definition television - HDTV (high definition television) is a television display technology that provides picture quality similar to 35 mm.
high definition 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.
high density DVD - HD-DVD (high-density DVD) is an optical digital storage medium with a capacity that far exceeds that of standard DVD media.
High Density Read Only Memory - HD-ROM (High-Density - Read Only Memory) is a high-capacity storage technology developed at Norsam Technologies in conjunction with an IBM research group that enables a disk to store hundreds of times as much information as a CD-ROM.
High Level Assembler - High Level Assembler (HLASM) is IBM's assembler programming language and the assembler itself for the IBM z/OS, z/VM, OS/390, MVS, VM, and VSE operating systems.
High Level Assembler (HLASM) - High Level Assembler (HLASM) is IBM's assembler programming language and the assembler itself for the IBM z/OS, z/VM, OS/390, MVS, VM, and VSE operating systems.
High level Data Link Control - HDLC (High-level Data Link Control) is a group of protocols or rules for transmitting data between network points (sometimes called nodes).
high performance computing - High-performance computing (HPC) is the use of parallel processing for running advanced application programs efficiently, reliably and quickly.
High Performance File System - HPFS (High Performance File System) is the file system introduced with IBM's OS/2 Version 1.
High Performance Parallel Interface - HIPPI (High-Performance Parallel Interface) is a standard point-to-point protocol for transmitting large amounts of data at up to billions of bits per second over relatively short distances, mainly on local area networks (LAN s).
High Speed Circuit Switched Data - High-Speed Circuit-Switched Data (HSCSD) is circuit-switched wireless data transmission for mobile users at data rates up to 38.
high speed dial-up - High-speed dialup, sometimes advertised as broadband dialup, is an Internet service provider (ISP) feature that speeds up data transfer by using a special server, called an acceleration server, to act as a bridge between the user's dialup connection and a Web page.
High Speed Downlink Packet Access - High-Speed Downlink Packet Access (HSDPA) is a packet-based mobile telephony protocol used in 3G UMTS radio networks.
High Speed Serial Interface - High-Speed Serial Interface (HSSI) is a short-distance communications interface that is commonly used to interconnect routing and switching devices on local area networks (LANs) with the higher-speed lines of a wide area network (WAN).
high value government data - According to the Open Government Directive, high value government data is any data that can increase agency accountability and responsiveness; improve public knowledge of the agency and its operations; further the core mission of the agency; create economic opportunity; or respond to need and demand as identified through public consultation.
High-bandwidth Digital Content Protection - HDCP (High-bandwidth Digital Content Protection) is a specified method from Intel for protecting copyrighted digital entertainment content that uses the Digital Video Interface (DVI) by encrypting its transmission between the video source and the digital display (receiver).
high-definition downconverter - An HD (high-definition) downconverter is a device that converts high-definition television (HDTV) video to standard-definition video that can be viewed on conventional television (TV) receivers or computer monitors, or recorded on DVD.
High-Definition Multimedia Interface - HDMI (High-Definition Multimedia Interface) is an industry standard for creating audio and video connections between high-definition electronic devices.
high-definition 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.
High-Density - Read Only Memory - HD-ROM (High-Density - Read Only Memory) is a high-capacity storage technology developed at Norsam Technologies in conjunction with an IBM research group that enables a disk to store hundreds of times as much information as a CD-ROM.
high-density DVD - HD-DVD (high-density DVD) is an optical digital storage medium with a capacity that far exceeds that of standard DVD media.
high-density server - A blade server is a thin, modular electronic circuit board containing one, two, or more microprocessors and memory, that is intended for a single, dedicated application (such as serving Web pages) and that can be easily inserted into a space-saving rack with many similar servers.
high-frequency trading (HFT) - High-frequency trading (HFT) is the use of sophisticated software and high-end hardware to gain a speed advantage in automated trading systems.
High-Level Data Link Control - HDLC (High-level Data Link Control) is a group of protocols or rules for transmitting data between network points (sometimes called nodes).
high-performance computing - High-performance computing (HPC) is the use of parallel processing for running advanced application programs efficiently, reliably and quickly.
high-performance computing (HPC) - High-performance computing (HPC) is the use of parallel processing for running advanced application programs efficiently, reliably and quickly.
High-Performance Parallel Interface - HIPPI (High-Performance Parallel Interface) is a standard point-to-point protocol for transmitting large amounts of data at up to billions of bits per second over relatively short distances, mainly on local area networks (LAN s).
High-Speed Circuit-Switched Data - High-Speed Circuit-Switched Data (HSCSD) is circuit-switched wireless data transmission for mobile users at data rates up to 38.
High-Speed Circuit-Switched Data (HSCSD) - High-Speed Circuit-Switched Data (HSCSD) is circuit-switched wireless data transmission for mobile users at data rates up to 38.
high-speed dialup - High-speed dialup, sometimes advertised as broadband dialup, is an Internet service provider (ISP) feature that speeds up data transfer by using a special server, called an acceleration server, to act as a bridge between the user's dialup connection and a Web page.
High-Speed Downlink Packet Access - High-Speed Downlink Packet Access (HSDPA) is a packet-based mobile telephony protocol used in 3G UMTS radio networks.
High-Speed Serial Interface - High-Speed Serial Interface (HSSI) is a short-distance communications interface that is commonly used to interconnect routing and switching devices on local area networks (LANs) with the higher-speed lines of a wide area network (WAN).
High-Speed Serial Interface (HSSI) - High-Speed Serial Interface (HSSI) is a short-distance communications interface that is commonly used to interconnect routing and switching devices on local area networks (LANs) with the higher-speed lines of a wide area network (WAN).
high-touch customer service - High-touch customer service refers to the idea that some customer service issues are complex or high value and thus require human interaction to resolve, not just digital technologies -- such FAQ sections or online customer communities -- to solve.
higher arithmetic - Number theory, also known as higher arithmetic, is a branch of mathematics concerned with the properties of integer s, rational number s, irrational number s, and real number s.
hijackware - A browser hijacker is a malware program that modifies web browser settings without the user's permission and redirects the user to websites the user had not intended to visit.
HIMSS - The Healthcare Information and Management Systems Society (HIMSS) is a nonprofit organization whose goal is to promote the best use of information technology and management systems in the health care industry.
HIMSS (Healthcare Information and Management Systems Society) - The Healthcare Information and Management Systems Society (HIMSS) is a nonprofit organization whose goal is to promote the best use of IT and management systems in the healthcare industry.
HiP7 - HiP7 and HiP8 are abbreviations for two versions of HiPerMOS, a complementary-metal-oxide-semiconductor (CMOS) microchip technology invented by Motorola.
HiP8 - HiP7 and HiP8 are abbreviations for two versions of HiPerMOS, a complementary-metal-oxide-semiconductor (CMOS) microchip technology invented by Motorola.
HIPAA - HIPAA (Health Insurance Portability and Accountability Act of 1996) is United States legislation that provides data privacy and security provisions for safeguarding medical information.
HIPAA (Health Insurance Portability and Accountability Act) - HIPAA (Health Insurance Portability and Accountability Act) is United States legislation that provides data privacy and security provisions for safeguarding medical information.
HIPAA disaster recovery plan - A HIPAA disaster recovery plan is a document that specifies the resources, actions, personnel and data that are required to protect and reinstate healthcare information in the event of a fire, vandalism, natural disaster or system failure.
HIPAA-compliant cloud storage - HIPAA-compliant cloud storage implements the guidelines of the U.
HipChat - Atlassian HipChat allows employees to collaborate, work as teams and manage goals, all in real time, whether they work in the same office building or are located around the world.
HiperLAN - MEO satellite"HiperLAN is a set of wireless local area network (WLAN) communication standards primarily used in European countries.
HiPerMOS - HiP7 and HiP8 are abbreviations for two versions of HiPerMOS, a complementary-metal-oxide-semiconductor (CMOS) microchip technology invented by Motorola.
HIPPI - HIPPI (High-Performance Parallel Interface) is a standard point-to-point protocol for transmitting large amounts of data at up to billions of bits per second over relatively short distances, mainly on local area networks (LAN s).
HIPPI (High-Performance Parallel Interface) - HIPPI (High-Performance Parallel Interface) is a standard point-to-point protocol for transmitting large amounts of data at up to billions of bits per second over relatively short distances, mainly on local area networks (LAN s).
HiPPO (highest paid person's opinion, highest paid person in the office) - HiPPOs (highest paid person's opinions) is a term used to describe an organization's reliance on executive instinct rather than data in the decision-making process.
HireVue - HireVue is an enterprise video interviewing technology vendor that allows recruiters and hiring managers to screen candidates and conduct live interviews over the Internet.
histogram - A histogram is a display of statistical information that uses rectangles to show the frequency of data items in successive numerical intervals of equal size.
historical data - Historical data, in a broad context, is collected data about past events and circumstances pertaining to a particular subject.
history - In a Web browser, the history is a detailed list of Web sites the computer has visited which remains in a computer's memory for a pre-determined number of days.
history of the Internet - A timeline is the presentation of a chronological sequence of events along a drawn line that enables a viewer to understand temporal relationships quickly.
History of the punch card - Learn about the role of punch cards in the history of data and data management.
HIT - Health IT (health information technology) is the area of IT involving the design, development, creation, use and maintenance of information systems for the healthcare industry.
hit - A hit is a single file request in the access log of a Web server.
HIT policy committee - The Health Information Technology (HIT) policy committee is a federal committee created by the American Recovery and Reinvestment Act of 2009 (ARRA) that advises the National Coordinator for Health IT on the creation of a nationwide health IT infrastructure.
HIT standards committee - The Health Information Technology (HIT) standards committee is a federal committee created by the American Recovery and Reinvestment Act of 2009 (ARRA) that advises the National Coordinator for Health IT on matters of standards, certification criteria and other issues surrounding EHRs and meaningful use.
Hitachi Unified Compute Platform (Hitachi UCP) - Hitachi Unified Compute Platform (UCP) is the company's product for converged infrastructure, combining server, storage, network and software management.
Hitachi Vantara (formerly Hitachi Data Systems or HDS) - Hitachi Vantara is a data storage systems provider, previously known as Hitachi Data Systems (HDS).
Hitchhiker's Guide to the Galaxy - In Douglas Adams' "The Hitchhiker's Guide to the Galaxy," 42 is the number from which all meaning ("the meaning of life, the universe, and everything") can be derived.
HITECH (Health Information Technology for Economic and Clinical Health) Act of 2009 - The HITECH (Health Information Technology for Economic and Clinical Health) Act of 2009 is legislation that was created to stimulate the adoption of electronic health records (EHR) and the supporting technology in the United States.
HITECH Act - The HITECH (Health Information Technology for Economic and Clinical Health) Act of 2009 is legislation that was created to stimulate the adoption of electronic health records (EHR) and the supporting technology in the United States.
HITSP - HITSP (Healthcare Information Technology Standards Panel) is an organization created to promote standardization and broad scale interoperability among healthcare applications and information systems.
HKEY - Handle to Registry Key (HKEY) is a typedef supplied in the Windows headers files.
HL7 (Health Level Seven International) - HL7 (Health Level Seven International) is a set of standards, formats and definitions for exchanging and developing electronic health records (EHRs).
HLASM - High Level Assembler (HLASM) is IBM's assembler programming language and the assembler itself for the IBM z/OS, z/VM, OS/390, MVS, VM, and VSE operating systems.
HLD - A hardware load-balancing device (HLD), also known as a layer 4-7 router, is a physical unit that directs computers to individual servers in a network, based on factors such as server processor utilization, the number of connections to a server, or the overall server performance.
HLR - The Home Location Register (HLR) is the main database of permanent subscriber information for a mobile network.
Hm - The henry per meter (symbolized H/m) is the unit of magnetic permeability in the International System of Units (SI).
HMAC - Hash-based Message Authentication Code (HMAC) is a message authentication code that uses a cryptographic key in conjunction with a hash function.
HMIPv6 - Hierarchical Mobile IPv6 (HMIPv6) is the proposed enhancement of Mobile Internet Protocol versions 6 (MIPv6) that is designed to reduce the amount of signaling required and to improve handoffspeed for mobile connections.
hoax - A virus hoax is a false warning about a computer virus.
hockey stick growth - Hockey stick growth refers to the shape of a chart showing sudden and very rapid growth.
Hofstadter's law - Hofstadter’s law is the observation that “It always takes longer than you expect, even when you take into account Hofstadter's Law.
holacracy - A holacracy is a governance structure characterized by a distribution of power among self-organizing groups, rather than the typical top-down hierarchical corporate culture model.
HOLAP - Hybrid online analytical processing (HOLAP) is a combination of relational OLAP (ROLAP) and multidimensional OLAP (usually referred to simply as OLAP).
hold orders - Litigation hold is a stipulation requiring a company to preserve all data that may relate to a legal action involving the company.
holding company - A holding company is a business that exists for the purpose of owning other companies and typically does not produce goods or offer services other than through its subsidiaries.
hole - In physics, a hole is an electric charge carrier with a positive charge, equal in magnitude but opposite in polarity to the charge on the electron.
holistic (holistic technology) - Holistic (holistic technology) is a concept concerned with treatment of entire systems, rather than the analysis, treatment or segmentation of parts of those systems.
holistic security - Holistic security is an approach that seeks to integrate all the elements designed to safeguard an organization, considering them as a complex and interconnected system.
holodeck - The holodeck is an immersive virtual reality environment that was featured on Star Trek, a popular science fiction television and film series of the late 20th century.
hologram - A hologram (pronounced HOL-o-gram) is a three-dimensional image, created with photographic projection.
holographic disk drive - A holographic disk drive is a holographic storage device that uses a laser to store data to optical media in three dimensions, maximizing storage capacity by using the media's depth.
holographic display - A holographic display is a display that uses coherent light, such as that created by laser, to create a three-dimensional (3D) image in space.
holographic print - A holographic print is a rendition of a hologram on a flat surface, producing 3-D (three-dimensional) effects when viewed.
holographic processing unit (HPU) - Holographic processing unit (HPU) is what Microsoft has named the coprocessor in its HoloLens virtual reality (VR) headset.
holographic storage - Holographic storage is computer storage that uses laser beams to store computer-generated data in three dimensions.
holographic storage (holostorage) - Holographic storage is computer storage that uses laser beams to store computer-generated data in three dimensions.
holographic telepresence - Holographic telepresence is an evolving technology for full-motion, three-dimensional (3D) video conferencing.
holographic versatile disc - Holographic versatile disc (HVD) is a medium of holographic storage that looks like a DVD but is capable of storing far more data.
holostorage - Holographic storage is computer storage that uses laser beams to store computer-generated data in three dimensions.
home address - In the Mobile Internet Protocol (Mobile IP), a home address is the relatively permanent IP address given to a mobile node.
home agent - In Mobile Internet Protocol (Mobile IP), a home agent is a router on a mobile node's home network that maintains information about the device's current location, as identified in its care-of address.
Home Audio Visual - HAVi (Home Audio Visual) is a standard, developed by several leading electronics and computer manufacturers, that allows a number of different home-entertainment and communication devices to operate from a single controller device such as your TV set.
home building software - Home building software, also known as residential construction software, is a collection of programs, processes and information that lets residential construction contractors manage the construction process from home design and remodeling, to cost estimates and accounting, to project management and project completion.
home building software (residential construction software) - Home building software, also known as residential construction software, is a collection of programs, processes and information that lets residential construction contractors manage the construction process from home design and remodeling, to cost estimates and accounting, to project management and project completion.
Home Location Register - The Home Location Register (HLR) is the main database of permanent subscriber information for a mobile network.
Home Location Register (HLR) - The Home Location Register (HLR) is the main database of permanent subscriber information for a mobile network.
home network - Using Mobile IP (Mobile Internet Protocol), the home network is where a mobile device has its permanent IP address.
home page - For a Web user, the home page is the first Web page that is displayed after starting a Web browser like Netscape's Navigator or Microsoft's Internet Explorer.
Home Phoneline Networking Alliance - The HPNA (Home Phoneline Networking Alliance) is an industry group that promotes standards for using existing phone lines and jacks to interconnect computers within a home.
Home Phoneline Networking Alliance (HPNA) - The HPNA (Home Phoneline Networking Alliance) is an industry group that promotes standards for using existing phone lines and jacks to interconnect computers within a home.
home radio frequency - HomeRF (for home radio frequency) is a home networking standard developed by Proxim Inc.
home school - A home school is a school in which parents teach their children an academic curriculum at home instead of sending them out to a public or private school.
home schooling - A home school is a school in which parents teach their children an academic curriculum at home instead of sending them out to a public or private school.
home server - A home server is a computer that functions as a server in a client-server home network.
homecam - A cam, homecam, or Webcam is a video camera, usually attached directly to a computer, whose current or latest image is requestable from a Web site.
Homeland Security - HSPD-7 (Homeland Security Presidential Directive No.
Homeland Security Presidential Directive No. 7 - HSPD-7 (Homeland Security Presidential Directive No.
homeostasis - Homeostasis is the automatic, dynamic maintenance of the optimal internal conditions for functioning in an organism.
HomePNA - HomePNA is an industry standard for interconnecting computers within a home using existing telephone lines and registered jack.
HomeRF - HomeRF (for home radio frequency) is a home networking standard developed by Proxim Inc.
HomeRF (home radio frequency) - HomeRF (for home radio frequency) is a home networking standard developed by Proxim Inc.
homologation - Homologation is the certification of a product to indicate that it meets regulatory standards.
homomorphic encryption - Homomorphic encryption is the conversion of data into ciphertext that can be analyzed and worked with as if it were still in its original form.
Honey Encryption - Honey Encryption is a security tool that makes it difficult for an attacker who is carrying out a brute force attack to know if he has correctly guessed a password or encryption key.
honey monkey - A honey monkey is a virtual computer system that is programmed to lure, detect, identify and neutralize malicious activity on the Internet.
honey pot - A honeypot is a network-attached system set up as a decoy to lure cyberattackers and to detect, deflect or study hacking attempts in order to gain unauthorized access to information systems.
honeynet - A honeynet is a network set up with intentional vulnerabilities; its purpose is to invite attack, so that an attacker's activities and methods can be studied and that information used to increase network security.
Honeynet Project - The Honeynet Project is a non-profit volunteer organization dedicated to computer security research and information sharing.
honeypot - A honeypot is a network-attached system set up as a decoy to lure cyberattackers and to detect, deflect or study hacking attempts in order to gain unauthorized access to information systems.
honeypot (computing) - A honeypot is a network-attached system set up as a decoy to lure cyber attackers and detect, deflect and study hacking attempts to gain unauthorized access to information systems.
hook - In programming, a hook is a place and usually an interface provided in packaged code that allows a programmer to insert customized programming.
hoot and holler - In telecommunications, a hoot-n-holler is a dedicated "always on" connection used for two-way business-to-business voice communication.
hoot-n-holler - In telecommunications, a hoot-n-holler is a dedicated "always on" connection used for two-way business-to-business voice communication.
Hootsuite - Hootsuite is a social media management system that gives users an integrated user interface from which to manage their social interactions.
hop - In a packet-switching network, a hop is the trip a data packet takes from one router or intermediate point to another in the network.
hop off - Hop off is a term used in telecommunications that refers to a point at which a signal or call leaves a network and moves to another network.
hop on - In telecommunications, hop on refers to a point at which a signal or call enters a network from another network.
hopoff - Hop off is a term used in telecommunications that refers to a point at which a signal or call leaves a network and moves to another network.
Hopper, Grace - Grace Murray Hopper (1906-1992) was a pioneer in computer science.
horizontal scalability (scaling out) - Horizontal scalability is the ability to connect multiple hardware or software entities so that they work as a single logical unit.
horn antenna - A horn antenna is used for the transmission and reception of microwave signals.
HORNET (high-speed onion routing network) - HORNET is an anonymized and accelerated onion routing network; the name is an acronym for high speed onion routing network.
horsepower - The horsepower (hp) is a unit in the foot-pound-second (fps) or English system, sometimes used to express the rate at which mechanical energy is expended.
horsepower (hp) - The horsepower (hp) is a unit in the foot-pound-second (fps) or English system, sometimes used to express the rate at which mechanical energy is expended.
Hospital Compare - Hospital Compare is a website that lets consumers compare the quality of hospital outpatient services.
Hospitality Financial and Technology Professionals (HFTP) - The Hospitality Financial and Technology Professionals (HFTP) organization is an international society established in 1952 for financial and technology professionals who work in the hospitality industry.
Hospitality Information Technology Association (HITA) - The Hospitality Information Technology Association (HITA) is an international association of hospitality educators, hardware and software vendors, information technology users, and consultants to the hospitality industry.
host (in computing) - A host (also known as "network host") is a computer or other device that communicates with other hosts on a network.
Host Analytics - Host Analytics is a provider of cloud-based corporate performance management (CPM) software.
host bus adapter - A host bus adapter (HBA) provides physical connectivity and input/output between a server and a network and/or storage device.
host bus adapter (HBA) - A host bus adapter (HBA) provides physical connectivity and input/output between a server and a network and/or storage device.
host file hijack - IP spoofing, also known as IP address forgery, is a hijacking technique in which the attacker masquerades as a trusted host to conceal his identity, hijack browsers, or gain access to a network.
host intrusion detection systems - Host intrusion detection systems (HIDS) and network intrusion detection systems (NIDS) are methods of security management for computers and networks.
host intrusion prevention systems (HIPS) - A host intrusion prevention system (HIPS) is a security method that relies on third-party software tools to monitor network traffic and system activities for anomalous code behavior to identify and prevent malicious activities.
host OS - A host OS is the software installed on a computer that interacts with the underlying hardware in a computer using virtualization technology.
Host OS (host operating system) - A host OS is the software installed on a computer that interacts with the underlying hardware in a computer using virtualization technology.
host virtual machine - A host virtual machine is the server component of a virtual machine (VM), the underlying hardware that provides computing resources to support a particular guest virtual machine (guest VM).
host virtual machine (host VM) - A host virtual machine is the server component of a virtual machine (VM), the underlying hardware that provides computing resources to support a particular guest virtual machine (guest VM).
host VM - A host virtual machine is the server component of a virtual machine (VM), the underlying hardware that provides computing resources to support a particular guest virtual machine (guest VM).
host-based replication - Host-based replication is the processes of using servers to copy data from one site to another.
host-based virtual machine - A host-based virtual machine is an instance of a desktop operating system that runs on a centralized server.
hosted AM - Software as a service (SaaS) is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet.
hosted application management - Software as a service (SaaS) is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet.
Hosted CRM - Hosted CRM is an arrangement in which a company outsources some or all of its customer relationship management (CRM) functions to an application service provider (ASP).
hosted hypervisor - A Type 2 hypervisor, also known as a hosted hypervisor, is a virtual machine manager that installs on top of a host's operating system (OS).
hosted services - Hosted services are applications, IT infrastructure components or functions that organizations access from external service providers, typically through an internet connection.
hosted virtual desktop (HVD) - A hosted virtual desktop (HVD) is a user interface that connects to applications and data that are stored on a cloud provider's servers rather than on the user's computer or the corporate network.
hosting - Hosting (also known as Web site hosting, Web hosting, and Webhosting) is the business of housing, serving, and maintaining files for one or more Web sites.
hosting (Web site hosting, Web hosting, and Webhosting) - Hosting (also known as Web site hosting, Web hosting, and Webhosting) is the business of housing, serving, and maintaining files for one or more Web sites.
hosting reseller - Reseller hosting is the provision of Web hosting services to companies that in turn act as Web hosts for other companies, typically providing Web site design and management services as well as acting as host for the site and serving its pages to users.
hot aisle/cold aisle - Hot aisle/cold aisle is a layout design for server racks and other computing equipment in a data center.
hot backup - Hot data backups are the standard for most database backups, as users can stay online while they are performed.
hot backup (dynamic backup) - Hot data backups are the standard for most database backups, as users can stay online while they are performed.
hot cloning - Hot cloning is a cloning method that takes place while the server OS is running.
hot data - Hot data is a reference to data that is accessed the most by an organization.
hot desking - Hot desking is a work space sharing model in which employees outnumber desks.
hot fix - A hotfix is code (sometimes called a patch) that fixes a bug in a product.
hot key - A hot key is a key or a combination of keys on a computer keyboard that, when pressed at one time, performs a task (such as starting an application) more quickly than by using a mouse or other input device.
hot mic (roving bug) - A hot mic, in a mobile security context, is a smartphone microphone that has been remotely activated for surveillance purposes.
hot plugging - Hot plugging is the addition of a component to a running computer system without significant interruption to the operation of the system.
hot server - In the backup and recovery of a computer server, a cold server is a backup server whose purpose is solely to be there in case the main server is lost.
hot site - A hot site is a commercial disaster recovery service that allows a business to continue computer and network operations in the event of a computer or equipment disaster.
hot site and cold site - A hot site is a commercial disaster recovery service that allows a business to continue computer and network operations in the event of a computer or equipment disaster.
hot spare - A hot spare, also called a hot standby, is a backup component that can be placed into service immediately when a primary component fails.
hot spot - For users of portable computers equipped for wireless, a hot spot (or hotspot) is a wireless LAN (local area network) node that provides Internet connection and virtual private network (VPN) access from a given location.
Hot Spot 2.0 (HS 2.0) - Hot Spot 2.0 (HS 2.
Hot spot/cold spot - A hot spot/cold spot is an undesirable tightly-focused local temperature variation which often occurs when data center equipment is improperly cooled.
hot standby - In the backup and recovery of a computer server, a cold server is a backup server whose purpose is solely to be there in case the main server is lost.
Hot Standby Router Protocol - Hot Standby Router Protocol (HSRP) is a routing protocol that allows host computers on the Internet to use multiple routers that act as a single virtual router, maintaining connectivity even if the first hop router fails, because other routers are on "hot standby" - ready to go.
Hot Standby Router Protocol (HSRP) - Hot Standby Router Protocol (HSRP) is a routing protocol that allows host computers on the Internet to use multiple routers that act as a single virtual router, maintaining connectivity even if the first hop router fails, because other routers are on "hot standby" - ready to go.
hot swap - A hot swap is the replacement of a hard drive, CD-ROM drive, power supply, or other device with a similar device while the computer system using it remains in operation.
hot zone - A hot zone is a wireless access area created by multiple hot spots located in close proximity to each other.
hot/cold aisle - Hot aisle/cold aisle is a layout design for server racks and other computing equipment in a data center.
hoteling - Hoteling (also called office hoteling) is the practice of providing office space to employees on an as-needed rather than on the traditional, constantly reserved basis.
hotfix - A hotfix is code (sometimes called a patch) that fixes a bug in a product.
hotspot - For users of portable computers equipped for wireless, a hot spot (or hotspot) is a wireless LAN (local area network) node that provides Internet connection and virtual private network (VPN) access from a given location.
HotSync - HotSync is the registered trade name for a sophisticated method of linking between a Palm handheld computer and a more substantial notebook, desktop, or other computer.
hotword - Hotword is an audio listening module included with Google Chrome and Chromium, the open source version of the browser.
hour - The hour (symbolized hr) is a unit of time, equivalent to 3600 seconds (s), 60 minutes (min), or 1/24 of a mean solar day (msd).
hour (hr) - The hour (symbolized hr) is a unit of time, equivalent to 3600 seconds (s), 60 minutes (min), or 1/24 of a mean solar day (msd).
How do I...choose a VPN for my small business? - A virtual private network (VPN)is a way to use a public telecommunication infrastructure, such as the Internet,to provide remote offices or individual users with secure access to their organization's network.
How do you pronounce IT? - How do you pronounce IT? Why, "eye-tee," of course! This page lists many of the most commonly mispronounced words in information technology.
How does RSS work? - RSS works by having the Web site author maintain a list of notifications on their Web site in a standard way.
How many bytes for... - This page provides tables and other information about how many bytes are required (how much computer storage) for various information objects or purposes; it also summarizes some facts that have been gathered about how much information exists in the world and, where appropriate, how much computer storage this requires.
How social media can help you find jobs that aren't advertised - Social media can help you find hidden employment opportunities, providing a platform both for showcasing your own expertise and for connecting with others who can help you along.
How spyware gets in your computer - Learn how spyware gets into your computer and how to prevent it from doing harm.
How to write a business case - A business case document is a formal, written argument intended to convince a decision-maker to approve some kind of action.
HP - HP (Hewlett-Packard) is a prominent IT company based in Palo Alto, California.
hp - The horsepower (hp) is a unit in the foot-pound-second (fps) or English system, sometimes used to express the rate at which mechanical energy is expended.
HP 9000 - The HP 9000 is a line of UNIX-based business servers from Hewlett-Packard (HP) with server models that span enterprise applications from the "entry-level" (branch or department-level computers, Web hosting servers, and so forth) through the midrange with needs for handling advanced enterprise resource planning (ERP) and analytical customer resource management (CRM) up to its high-end servers for very computing-intensive applications.
HP Channel Services Network (HP CSN) - HP Channel Services Network (HP CSN) is a Web-based management system and membership program for HP's authorized channel service partners.
HP CloudAgile Service Provider Program - HP CloudAgile Service Provider Program is an initiative aimed at cloud and telecommunication providers, hosting service providers, system integrators and value-added resellers (VARs) in the cloud market.
HP e3000 - The HP e3000 is a line of midrange business servers that carries on the well-known series of 3000 computers from Hewlett-Packard (HP).
HP ePrint Platform - HP's ePrint Platform is a printing method which utilizes the cloud to allow for on-the-go printing through e-mail.
HP Helion (Hewlett-Packard Helion) - HP Helion (Hewlett-Packard Helion) is the brand name for HP’s custom distribution of OpenStack.
HP OpenView - HP OpenView is a suite of business computer management or "e-services" programs from Hewlett-Packard (HP), which states that the suite is "among the world's 20 largest software businesses.
HP Partner First Program (formerly HP PartnerOne program) - HP Partner First is a channel partner program that provides resources and benefits for value-added resellers (VARs), systems integrators (SIs), service providers, hosting providers, independent software vendors (ISVs), distributors and other businesses that want to collaborate with HP Inc.
HP Quality Center - HP Quality Center is Hewlett-Packard’s software quality management product, part of the company’s application lifecycle management software suite.
HP Virtual Server Environment - The HP Virtual Server Environment (HP VSE) is a server virtualization product developed by Hewlett-Packard (HP) to optimize resource utilization in their HP Integrity and HP 9000 servers.
HP Virtual Server Environment (HP VSE) - The HP Virtual Server Environment (HP VSE) is a server virtualization product developed by Hewlett-Packard (HP) to optimize resource utilization in their HP Integrity and HP 9000 servers.
HP VSE - The HP Virtual Server Environment (HP VSE) is a server virtualization product developed by Hewlett-Packard (HP) to optimize resource utilization in their HP Integrity and HP 9000 servers.
HP-GL (Hewlett-Packard Graphics Language) - HP-GL (Hewlett-Packard Graphics Language) is a vector graphics language, a type of object-oriented language that represents images through the use of geometrical formulas.
HP-UX - HP-UX is the UNIX-based operating system for the HP 9000 series of business servers from Hewlett-Packard.
HP9000 - The HP 9000 is a line of UNIX-based business servers from Hewlett-Packard (HP) with server models that span enterprise applications from the "entry-level" (branch or department-level computers, Web hosting servers, and so forth) through the midrange with needs for handling advanced enterprise resource planning (ERP) and analytical customer resource management (CRM) up to its high-end servers for very computing-intensive applications.
HPC - High-performance computing (HPC) is the use of parallel processing for running advanced application programs efficiently, reliably and quickly.
HPCaaS (High-Performance Computing as a Service) - High performance computing as a service (HPCaaS) is the provision of high-level processing capacity to customers through the cloud.
HPE OneView (formerly HP OneView) - HPE OneView, formerly known as HP OneView, is a converged infrastructure management platform that provides a unified interface for the administration of software-defined systems in a data center.
HPE Partner Ready Program - The HPE Partner Ready Program is a global partner program that rewards and supports Hewlett Packard Enterprise's channel alliances.
HPFS - HPFS (High Performance File System) is the file system introduced with IBM's OS/2 Version 1.
HPFS (High Performance File System) - HPFS (High Performance File System) is the file system introduced with IBM's OS/2 Version 1.
HPNA - HomePNA is an industry standard for interconnecting computers within a home using existing telephone lines and registered jack.
HPNA - The HPNA (Home Phoneline Networking Alliance) is an industry group that promotes standards for using existing phone lines and jacks to interconnect computers within a home.
HPSS (High Performance Storage System) - HPSS (High Performance Storage System) is a storage management system especially designed for moving large files and large amounts of data around a nework that may consist of parallel processing computers, supercomputers, and clusters of high-end workstations.
hr - The hour (symbolized hr) is a unit of time, equivalent to 3600 seconds (s), 60 minutes (min), or 1/24 of a mean solar day (msd).
HR help desk - HR help desk refers to a central source of information employees can consult about human resource questions.
HR service delivery - HR service delivery is a term used to explain how an organization's human resources department offers services to and interacts with employees.
HR technology (human resources tech) - HR technology (human resources technology) is an umbrella term for software and associated hardware automating the human resources function in organizations.
HRIS (human resource information system) - A human resource information system (HRIS) is software that provides a centralized repository of employee master data that the human resource management (HRM) group needs for completing core human resource (core HR) processes.
HRIS director (human resources information system director) - An HRIS (human resource information system) director is the manager who serves as a technical point of contact for the organization's human resource management department.
HRM - This definition explains the meaning of human resource management (HRM) and how HRM helps organizations manage their employees.
HS - This page provides a description of the abbreviations and meanings of each of the lights that describe the "handshaking" between a computer modem and the UART chip in a computer.
HSB - Hue, saturation, and brightness are aspects of color in the red, green, and blue (RGB) scheme.
HSCSD - High-Speed Circuit-Switched Data (HSCSD) is circuit-switched wireless data transmission for mobile users at data rates up to 38.
HSDPA - High-Speed Downlink Packet Access (HSDPA) is a packet-based mobile telephony protocol used in 3G UMTS radio networks.
HSDPA (High-Speed Downlink Packet Access) - High-Speed Downlink Packet Access (HSDPA) is a packet-based mobile telephony protocol used in 3G UMTS radio networks.
HSM - HSM (Hierarchical Storage Management) is policy-based management of file backup and archiving in a way that uses storage devices economically and without the user needing to be aware of when files are being retrieved from backup storage media.
HSM (Hierarchical Storage Management) - HSM (Hierarchical Storage Management) is policy-based management of file backup and archiving in a way that uses storage devices economically and without the user needing to be aware of when files are being retrieved from backup storage media.
HSPA (high speed packet access) - HSPA (high speed packet access) is a third-generation (3G) mobile broadband communications technology.
HSPD 7 - HSPD-7 (Homeland Security Presidential Directive No.
HSPD-7 - HSPD-7 (Homeland Security Presidential Directive No.
HSPD-7 (Homeland Security Presidential Directive No. 7) - HSPD-7 (Homeland Security Presidential Directive No.
HSRP - Hot Standby Router Protocol (HSRP) is a routing protocol that allows host computers on the Internet to use multiple routers that act as a single virtual router, maintaining connectivity even if the first hop router fails, because other routers are on "hot standby" - ready to go.
HSS - Directional sound is a technology that concentrates acoustic energy into a narrow beam so that it can be projected to a discrete area, much as a laser focuses light.
HSSI - High-Speed Serial Interface (HSSI) is a short-distance communications interface that is commonly used to interconnect routing and switching devices on local area networks (LANs) with the higher-speed lines of a wide area network (WAN).
HT - A handie talkie, often referred to by its abbreviation, HT, is a handheld, portable two-way radio transceiver.
htaccess - .htaccess is the default name for a file that is used to indicate who can or cannot access the contents of a specific file directory from the Internet or an intranet.
HTF - The Higgins Trust Framework (HTF) is an API (application program interface) that allows end users to store identity information in locations of their choice and share portions of that information anonymously with online vendors and service providers in a controlled manner.
htm - htm is sometimes used as a short form of the file name suffix for an HTML file.
HTML - HTML (Hypertext Markup Language) is a text-based approach to describing how content contained within an HTML file is structured.
HTML (Hypertext Markup Language) - HTML (Hypertext Markup Language) is a text-based approach to describing how content contained within an HTML file is structured.
HTML 4.0 - HTML 4.0 was the final version of the Hypertext Markup Language (HTML) before the Extensible Markup Language (XHTML) and remains the set of markup on which most large Web sites today are based.
HTML 5 desktop client - An HTML5 desktop client is a type of remote desktop client that provides an end user with access to a desktop or application through a web browser.
HTML comment - You can include a comment in an HTML document.
HTML validator - An HTML validator is a quality assurance program used to check Hypertext Markup Language (HTML) markup elements for syntax errors.
HTML, XHTML and XML Cheat Sheets - We've gathered resources from around the Web to help you with website coding.
HTML5 - HTML 5 is a revision of the Hypertext Markup Language (HTML), the standard programming language for describing the contents and appearance of Web pages.
HTML5 mobile app - HTML5 mobile apps are developed through that version of the Web content standard.
HTTP - HTTP (Hypertext Transfer Protocol) is the set of rules for transferring files (text, graphic images, sound, video, and other multimedia files) on the World Wide Web.
HTTP (Hypertext Transfer Protocol) - HTTP (Hypertext Transfer Protocol) is the set of rules for transferring files -- such as text, images, sound, video and other multimedia files -- over the web.
HTTP 1.1 - HTTP 1.1 is the latest version of Hypertext Transfer Protocol (HTTP), the World Wide Web application protocol that runs on top of the Internet's TCP/IP suite of protocols.
HTTP over SSL - HTTPS (HTTP over SSL or HTTP Secure) is the use of Secure Socket Layer (SSL) or Transport Layer Security (TLS) as a sublayer under regular HTTP application layering.
HTTP querystring - A querystring is a set of characters input to a computer or Web browser and sent to a query program to recover specific information from a database.
HTTP Secure - HTTPS (HTTP over SSL or HTTP Secure) is the use of Secure Socket Layer (SSL) or Transport Layer Security (TLS) as a sublayer under regular HTTP application layering.
HTTP/2 protocol - HTTP/2 protocol is the second version of HTTP, a network protocol used to define the format and transmission of data.
HTTP/S - HTTPS (HTTP over SSL or HTTP Secure) is the use of Secure Socket Layer (SSL) or Transport Layer Security (TLS) as a sublayer under regular HTTP application layering.
HTTPD - On the Web, each server has an HTTPD or Hypertext Transfer Protocol daemon that waits in attendance for requests to come in from the rest of the Web.
HTTPS - HTTPS (HTTP over SSL or HTTP Secure) is the use of Secure Socket Layer (SSL) or Transport Layer Security (TLS) as a sublayer under regular HTTP application layering.
HTTPS (HTTP over SSL or HTTP Secure) - HTTPS (HTTP over SSL or HTTP Secure) is the use of Secure Socket Layer (SSL) or Transport Layer Security (TLS) as a sublayer under regular HTTP application layering.
Huawei Technologies - Huawei is a Chinese information and communications technology (ICT) company that specializes in telecommunications equipment.
hub transport server (HT server) - Hub transport server is an Exchange Server role that handles all mail flow within an Exchange organization.
HubSpot - HubSpot is a company that sells software designed for inbound marketing, including content management, search engine optimization and other tools.
huddle room - A huddle room is a small conference area, typically seating 3-6 people and equipped with conferencing and collaboration technologies.
hue, saturation, and brightness - Hue, saturation, and brightness are aspects of color in the red, green, and blue (RGB) scheme.
human attack surface - Human attack surface is the totality of all security vulnerabilities within a given system or network that are created through human activities.
human capital management (HCM) - Human capital management (HCM) is a comprehensive set of practices and tools used for recruiting, managing and developing employees.
human computer interaction - HCI (human-computer interaction) is the study of how people interact with computers and to what extent computers are or are not developed for successful interaction with human beings.
human downgrading - Human downgrading is the combined negative effects of digital technology on people and society.
human factors - In industry, human factors (also known as ergonomics) is the study of how humans behave physically and psychologically in relation to particular environments, products, or services.
human factors (ergonomics) - In industry, human factors (also known as ergonomics) is the study of how humans behave physically and psychologically in relation to particular environments, products, or services.
human factors engineering - Ergonomics (from the Greek word "ergon" meaning work, and "nomoi" meaning natural laws), is the science of refining the design of products to optimize them for human use.
Human Genome Project - The Human Genome Project is a global, long-term research effort to identify the estimated 30,000 genes in human DNA (deoxyribonucleic acid) and to figure out the sequences of the chemical bases that make up human DNA.
Human Interface Device protocol - Human Interface Device protocol (HID protocol) is a USB protocol for a broad category of user input devices.
human resource management - This definition explains the meaning of human resource management (HRM) and how HRM helps organizations manage their employees.
human resource management (HRM) - Human resource management (HRM) is the practice of recruiting, hiring, deploying and managing an organization's employees.
Human Resources (HR) Generalist - A human resources (HR) generalist is an employee in the HR department who handles a wide variety of responsibilities.
Human Resources Cheat Sheets - We've gathered resources from around the Web to help you handle tricky human resources-related tasks, like interviewing and evaluating prospective employees.
human-centric BPM - Human-centric business process management is an approach to BPM that considers human skills and activities first and uses automated functions to support them.
human-computer interaction - HCI (human-computer interaction) is the study of how people interact with computers and to what extent computers are or are not developed for successful interaction with human beings.
human-machine interface (HMI) - A human-machine interface (HMI) is the user interface that connects an operator to the controller for an industrial system.
humane tech - The humane tech movement is a growing initiative dedicated to aligning technology to human needs rather than exploiting human vulnerabilities for profit, as has too often been the model in the past.
humanware - Humanware is hardware and software that emphasizes user capability and empowerment and the design of the user interface.
hundred call second - The hundred call second -- also known as the centum call second (CCS) -- is a unit of telecommunications traffic density that is the equivalent of one call (including call attempts and holding time) in a specific channel for 100 seconds in an hour.
hundred call second or centum call second (CCS) - The hundred call second -- also known as the centum call second (CCS) -- is a unit of telecommunications traffic density that is the equivalent of one call (including call attempts and holding time) in a specific channel for 100 seconds in an hour.
Hungarian notation - In programming, Hungarian notation is a set of conventions for naming data objects in which a programmer adds a meaningful prefix of one or several characters to the object's name to identify what type of object it is.
hurdle rate - A hurdle rate is the required rate of return above which an investment makes sense and below which it does not.
HVAC - HVAC stands for heating, ventilation, and air conditioning.
HVAC (heating, ventilation, and air conditioning) - HVAC stands for heating, ventilation, and air conditioning.
HVD - Holographic versatile disc (HVD) is a medium of holographic storage that looks like a DVD but is capable of storing far more data.
HVD (holographic versatile disc) - Holographic versatile disc (HVD) is a medium of holographic storage that looks like a DVD but is capable of storing far more data.
hybrid app - A hybrid application (hybrid app) is one that combines elements of both native and Web applications.
hybrid application - A hybrid application (hybrid app) is one that combines elements of both native and Web applications.
hybrid application (hybrid app) - A hybrid application (hybrid app) is one that combines elements of both native and Web applications.
hybrid cloud hosting - Hybrid cloud hosting allows organizations to provision dedicated servers and storage and cloud servers and storage on the same network.
Hybrid Cloud Storage - Hybrid cloud storage is an approach to managing storage that uses both local and off-site resources.
Hybrid cloud vocabulary quiz - Take this quiz to find out how much you know about the essential terminology related to hybrid cloud technologies.
hybrid database - A hybrid database is a type of real-time database system that uses both on-disk and in-memory data storage by deciding which is most suitable for a given task.
Hybrid DMZ Reference Designs for vCloud Air - Hybrid DMZ Reference Designs for vCloud Air are a series of recommended architectures, or designs, created to help users introduce the tools, resources and services commonly found in on-premises data centers to the public cloud.
hybrid ECM (hybrid enterprise content management) - Hybrid ECM (hybrid enterprise content management) is the practice of using cloud services to augment or supplement on-premises software that manages enterprise content.
hybrid fiber coaxial - A hybrid fiber coaxial (HFC) network is a telecommunication technology in which optical fiber cable and coaxial cable are used in different portions of a network to carry broadband content (such as video, data, and voice).
hybrid fiber coaxial network - A hybrid fiber coaxial (HFC) network is a telecommunication technology in which optical fiber cable and coaxial cable are used in different portions of a network to carry broadband content (such as video, data, and voice).
hybrid fiber coaxial network (HFC network) - A hybrid fiber coaxial (HFC) network is a telecommunication technology in which optical fiber cable and coaxial cable are used in different portions of a network to carry broadband content (such as video, data, and voice).
hybrid flash array - A hybrid flash array is a solid-state storage system that contains a mix of flash memory drives and hard disk drives.
hybrid hard drive - A hybrid hard drive (HHD), sometimes known as a solid-state hybrid drive (SSHD), is a mass storage device that combines a conventional hard disk drive and a NAND flash module.
hybrid hard drive (HHD) - A hybrid hard drive (HHD), sometimes known as a solid-state hybrid drive (SSHD), is a mass storage device that combines a conventional hard disk drive and a NAND flash module.
hybrid health record - A hybrid health record (HHR) is documentation of an individual's health information that is tracked in multiple formats and stored in multiple places.
hybrid health record (HHR) - A hybrid health record (HHR) is documentation of an individual's health information that is tracked in multiple formats and stored in multiple places.
hybrid Insect MEMS - The Hybrid Insect Micro-Electro-Mechanical Systems (HI-MEMS) program, also known as the cybug program, is a proposal from the Defense Advanced Research Projects Agency (DARPA) to encourage the development of cyborg insects that can be controlled by humans.
Hybrid Insect Micro Electro Mechanical Systems - The Hybrid Insect Micro-Electro-Mechanical Systems (HI-MEMS) program, also known as the cybug program, is a proposal from the Defense Advanced Research Projects Agency (DARPA) to encourage the development of cyborg insects that can be controlled by humans.
Hybrid Insect Micro-Electro-Mechanical Systems - The Hybrid Insect Micro-Electro-Mechanical Systems (HI-MEMS) program, also known as the cybug program, is a proposal from the Defense Advanced Research Projects Agency (DARPA) to encourage the development of cyborg insects that can be controlled by humans.
hybrid IT - Hybrid IT is an approach to enterprise computing in which an organization provides and manages some information technology (IT) resources in-house but uses cloud-based services for others.
hybrid manufacturing - Hybrid manufacturing is a term that describes combining additive manufacturing and subtractive manufacturing in a single machine system.
hybrid mobile app dev - Hybrid mobile app development is an approach to programming for mobile devices that combines the strengths of native programming and HTML5 mobile app development.
Hybrid OLAP - Hybrid online analytical processing (HOLAP) is a combination of relational OLAP (ROLAP) and multidimensional OLAP (usually referred to simply as OLAP).
hybrid online analytical processing - Hybrid online analytical processing (HOLAP) is a combination of relational OLAP (ROLAP) and multidimensional OLAP (usually referred to simply as OLAP).
hybrid online analytical processing (HOLAP or Hybrid OLAP) - Hybrid online analytical processing (HOLAP) is a combination of relational OLAP (ROLAP) and multidimensional OLAP (usually referred to simply as OLAP).
hybrid SDN - A hybrid SDN (software-defined network) is a network where both traditional networking and SDN protocols operate in the same environment.
hybrid virus - A hybrid virus (sometimes called a multi-part or multipartite virus) is one that combines characteristics of more than one type to infect both program files and system sectors.
hybrid virus (multi-part or multipartite virus) - A hybrid virus (sometimes called a multi-part or multipartite virus) is one that combines characteristics of more than one type to infect both program files and system sectors.
hybrid virus/worm - A hybrid virus/worm is malicious code that combines characteristics of both those types of malware, typically featuring the virus' ability to alter program code with the worm's ability to reside in live memory and to propagate without any action on the part of the user.
hybrid WAN - A hybrid WAN is a wide area network that sends traffic over two or more connection types.
hybrid workforce - A hybrid workforce is a type of blended workforce comprising employees who work remotely and those who work from an office or central location.
Hydra - The Microsoft Windows Terminal Server (WTS) is a server program running on its Windows NT 4.
hydraulics - Hydraulics is mechanical function that operates through the force of liquid pressure.
hydrofluorocarbon (HFC) clean agent - Data centers and telecom rooms use hydrofluorocarbon (HFC) clean agent systems for fire protection to avoid damaging electrical and electronic equipment.
hyper - As an adjective, hyper is slang for "keyed up" or "overwrought.
hyper LAN - MEO satellite"HiperLAN is a set of wireless local area network (WLAN) communication standards primarily used in European countries.
hyper-converged appliance - A hyper-converged appliance is a hardware device that provides multiple data center management technologies within a single box.
hyper-converged network - A hyper-converged network is a network that combines compute and storage network resources into a single preconfigured stack, server or brick with heavy use of virtualization.
hyper-converged software - Hyper-converged software is a type of virtualization platform that turns a commodity server into a hyper-converged appliance that includes compute, storage and server virtualization in one box.
hyper-converged storage - Hyper-converged storage is a software-defined approach to storage management that combines storage, compute, virtualization and sometimes networking technologies in one physical unit that is managed as a single system.
Hyper-G - Hyper-G is a publishing system with hypertext features more advanced than those available with the Hypertext Transfer Protocol and today's Web browser.
hyper-hybrid cloud - A hyper-hybrid cloud is a complex distributed environment involving multiple and diverse interconnected public and private clouds, often from multiple providers.
Hyper-Threading - Hyper-Threading is a technology used by some Intel microprocessors that allows a single microprocessor to act like two separate processors to the operating system and the application programs that use it.
Hyper-V Cloud - Hyper-V Cloud is a combination of Microsoft virtualization and virtualization management software that makes it easier for businesses to virtualize their existing server hardware assets and either consolidate them or move them to the cloud.
Hyper-V live migration - Hyper-V live migration is a Hyper-V feature that lets admins move running virtual machines from one failover cluster node to a cluster in the same node.
Hyper-V Replica - Hyper-V Replica is a free disaster recovery tool in Hyper-V 3.
Hyper-V Virtual Fibre Channel - Virtual Fibre Channel is a feature in Microsoft Hyper-V 3.
hyperautomation - Hyperautomation is a framework and set of advanced technologies for scaling automation in the enterprise; the ultimate goal of hyperautomation is to develop a process for automating enterprise automation.
HyperCard - HyperCard is an early (1986) Macintosh application that enables users to author hypertext pages, called cards, without any programming knowledge.
hyperconnectivity - Hyperconnectivity is a state of unified communications (UC) in which the traffic-handling capacity and bandwidth of a network always exceed the demand.
HyperGrid - HyperGrid is a cloud computing provider that offers Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and application management services.
HyperLAN - MEO satellite"HiperLAN is a set of wireless local area network (WLAN) communication standards primarily used in European countries.
Hyperledger - Hyperledger is an open source project created to support the development of blockchain-based distributed ledgers.
hyperlink - On the Web or other hypertext systems, hyperlink is a synonym for both link and hypertext link.
hypermedia - Hypermedia, a term derived from hypertext, extends the notion of the hypertext link to include links among any set of multimedia objects, including sound, motion video, and virtual reality.
hyperscale computing - Hyperscale computing is a distributed computing environment in which the volume of data and the demand for certain types of workloads can increase exponentially yet still be accommodated in a cost-effective manner.
hyperscale storage - Hyperscale storage is the storage of vast quantities of information in media capable of increasing in size rapidly, efficiently, and indefinitely.
Hypersonic Sound - Directional sound is a technology that concentrates acoustic energy into a narrow beam so that it can be projected to a discrete area, much as a laser focuses light.
hyperspace - Hyperspace is a term that describes the total number of individual locations and all of their interconnections in a hypertext environment.
HyperTerminal - HyperTerminal is a communications and terminal emulation program that came with the Windows 98 and Windows XP operating systems.
hypertext - Hypertext is the organization of information units into connected associations that a user can choose to make.
Hypertext Markup Language - HTML (Hypertext Markup Language) is a text-based approach to describing how content contained within an HTML file is structured.
Hypertext Preprocessor - PHP is a script language and interpreter that is freely available and used primarily on Linux Web servers.
Hypertext Transfer Protocol - HTTP (Hypertext Transfer Protocol) is the set of rules for transferring files (text, graphic images, sound, video, and other multimedia files) on the World Wide Web.
Hypertext Transfer Protocol 1.1 - HTTP 1.1 is the latest version of Hypertext Transfer Protocol (HTTP), the World Wide Web application protocol that runs on top of the Internet's TCP/IP suite of protocols.
Hypertext Transfer Protocol daemon - On the Web, each server has an HTTPD or Hypertext Transfer Protocol daemon that waits in attendance for requests to come in from the rest of the Web.
Hypertext Transfer Protocol daemon (HTTPD) - On the Web, each server has an HTTPD or Hypertext Transfer Protocol daemon that waits in attendance for requests to come in from the rest of the Web.
HyperTransport - HyperTransport is a high-speed, point-to-point, 32-bit technology for data transfer within the integrated circuits (IC s) in computers and other devices.
hypervisor - A hypervisor is a function that abstracts -- isolates -- operating systems (OSes) and applications from the underlying computer hardware.
hypervisor attack - A hypervisor attack can allow hackers to take control of your VMs.
hypervisor security - Hypervisor security is the process of ensuring the hypervisor, the software that enables virtualization, is secure throughout its life cycle, including during development, implementation, provisioning, management and de-provisioning.
hypothesis - A hypothesis (plural: hypotheses) is a statement that may be tested and proven to be either true or false.
hysteresis - Hysteresis is the tendency for a system to change or react based on a trend of how it has already transformed leading up to a specific point in time.
Hz - Hertz is a unit of frequency (of change in state or cycle in a sound wave, alternating current, or other cyclical waveform) of one cycle per second.
