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.
hacking as a service (HaaS) - Hacking as a service (HaaS) is the commercialization of hacking skills, in which the hacker serves as a contractor.
Hadoop - Hadoop is an open source distributed processing framework that manages data processing and storage for big data applications in scalable clusters of computer servers.
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.
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.
Hamming code - Hamming code is an error correction system that can detect and correct errors when data is stored or transmitted.
haptics - Haptics is the science of applying a sense of touch and control to interaction with computer applications.
hard skills - Hard skills are specific abilities, capabilities and skill sets that an individual can possess and demonstrate in a measured way.
hard-drive encryption - Hard-drive encryption is a technology that encrypts the data stored on a hard drive using sophisticated mathematical functions.
hardware clustering - Hardware clustering, sometimes called OS 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.
harmonic - A harmonic is a wave or signal whose frequency is an integral (whole number) multiple of the frequency of the same reference signal or wave.
HashiCorp - HashiCorp is a software company that provides a suite of modular DevOps infrastructure provisioning and management products.
hashing - Hashing is the process of transforming any given key or a string of characters into another value.
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.
HD-DVD (high-definition DVD) - HD-DVD (high-definition DVD) is a defunct high-capacity optical storage medium that was once seen as the successor to the DVD.
HDD form factor (hard disk drive form factor) - HDD form factor (hard disk drive form factor) is the size or geometry of a data storage device equipped with one or more magnetic-coated spinning platters and one or more moving actuator arms with magnetic heads to read and write information.
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).
HDTV (high-definition television) - HDTV (high-definition television) is a television display technology that provides picture quality similar to 35 mm movies with sound quality similar to that of a compact disc.
headless browser - A headless browser is a web browser without a graphical user interface (GUI).
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 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.
healthcare CIO (healthcare chief information officer) - A healthcare CIO (healthcare chief information officer) is an executive at a healthcare organization that oversees the operation of the information technology department and consults with other C-level personnel on technology-related needs and purchasing decisions.
heartbeat (computing) - In computing, a heartbeat is a program that runs specialized scripts automatically whenever a system is initialized or rebooted.
Heartbleed - Heartbleed was a vulnerability in some implementations of OpenSSL, an open source cryptographic library.
heat - Heat is the transfer of thermal energy from one physical system to another system or from one region in a physical system to another region.
heat map (heatmap) - A heat map is a two-dimensional representation of data in which various values are represented by colors.
HELLO packet - A HELLO packet is a special data packet (message) that is sent out periodically from a router to establish and confirm network adjacency relationships to other routers in the Open Shortest Path First (OSPF) communications protocol.
help desk - A help desk is the individual, group, organizational function or external service that an IT user calls to get help with a problem.
hertz (Hz) - Hertz (Hz) is the standard unit of frequency in the International System of Units (SI).
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) - HP (Hewlett-Packard) is a prominent IT company based in Palo Alto, California.
Hibernate - Hibernate is an open source object relational mapping (ORM) tool that provides a framework to map object-oriented domain models to relational databases for web applications.
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.
hierarchical storage management (HSM) - Hierarchical storage management (HSM) is policy-based management of data files that uses storage media economically and without the user being aware of when files are retrieved from storage.
hierarchy - Generally speaking, hierarchy refers to an organizational structure in which items are ranked in a specific manner, usually according to levels of importance.
high-performance computing - High-performance computing (HPC) is the practice of using parallel data processing to improve computing performance and perform complex calculations.
HireVue - HireVue is an enterprise video interviewing technology provider of a platform that lets recruiters and hiring managers screen candidates and conduct live interviews over the internet.
histogram - A histogram is a type of chart that shows the frequency distribution of data points across a continuous range of numerical values.
historical data - Historical data, in a broad context, is data collected about past events and circumstances pertaining to a particular subject.
hockey stick growth - Hockey stick growth is a growth pattern in a line chart that shows a sudden and extremely rapid growth after a long period of linear growth.
Hofstadter's law - Hofstadter's law states that a project always takes longer than expected, even when the law is taken into account.
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.
holistic (holistic technology) - Holistic technology is an approach to IT management that considers the infrastructure as a whole instead of as a collection of individual systems.
holographic storage (holostorage) - Holographic storage is computer storage that uses laser beams to store computer-generated data in three dimensions.
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 monkey - A honey monkey is a virtual computer system that is programmed to lure, detect, identify and neutralize malicious activity on the Internet.
honeynet - A honeynet is a network set up with intentional vulnerabilities hosted on a decoy server to attract hackers.
hook - In programming, a hook is a place and usually an interface provided in packaged code that allows a programmer to insert customized programming.
horsepower (hp) - Horsepower (hp) is a unit of measurement in the foot-pound-second (fps or ft-lb/s) or English system, sometimes used to express the rate at which mechanical energy is expended.
host bus adapter (HBA) - A host bus adapter (HBA) is a circuit board or integrated circuit adapter that connects a host system, such as a server, to a storage or network device.
host intrusion prevention system (HIPS) - A host intrusion prevention system (HIPS) is an approach to security that relies on third-party software tools to identify and prevent malicious activities.
host virtual machine (host VM) - A host virtual machine is the server component of a virtual machine the underlying hardware that provides computing resources to support a particular guest VM.
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 (website hosting, web hosting and webhosting) - Web hosting -- also known as website hosting or webhosting -- is the process where a web hosting provider stores and maintains website files and applications on a server to make its customers' websites accessible on the internet.
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 swap - A hot swap describes the act of removing components from or plugging them into a computer system while the power remains switched on.
hotfix - A hotfix is code -- sometimes called a patch -- that fixes a bug in a product.
hotkey - 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 performing a task by using a mouse or other input device.
Hotspot 2.0 - Hotspot 2.0, also known as Wi-Fi Certified Passpoint, is a standard for public-access Wi-Fi that enables seamless roaming among Wi-Fi networks and between Wi-Fi and cellular networks.
How many bytes for... - Data is often expressed in bytes, which are composed of eight binary digits.
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.
HR help desk - HR help desk refers to a central source of information employees can consult about human resource questions.
HR technology (human resources tech) - HR technology (human resources technology) is an umbrella term for hardware and software used to automate the human resource function in organizations.
HSDPA (High-Speed Downlink Packet Access) - High-Speed Downlink Packet Access (HSPDA) is a packet-based mobile telephony protocol used in 3G Universal Mobile Telecommunications Service (UMTS) radio networks to increase data capacity and speed up download rates.
HTML (Hypertext Markup Language) - HTML (Hypertext Markup Language) is a text-based approach to describing how content contained within an HTML file is structured.
HTML5 - HTML5 is commonly thought to be the fifth version, or release, of the Hypertext Markup Language (HTML), a standardized descriptive language that specifies how to structure webpages.
HTML5 mobile app - An HTML5 mobile app is a web application developed with version 5 of HTML, a web content standard designed for handheld devices like smartphones and tablets.
hue, saturation and brightness - Hue, saturation and brightness, or HSB, are aspects of color in the red, green, and blue (RGB) scheme.
Hugging Face - Hugging Face is a machine learning and data science platform and community that helps users build, deploy and train machine learning models.
human capital management (HCM) - Human capital management (HCM) is a comprehensive set of practices and tools used for recruiting, managing and developing employees as a valuable business 'asset' rather than just as a business 'cost.
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 generalist is an HR professional who handles the daily responsibilities of talent management, employee onboarding, and administering compensation and benefits plans for the human resources department.
hybrid application (hybrid app) - A hybrid app is a software application that combines elements of both native apps and web applications.
hybrid backup - A hybrid backup is typically when organizations use both on-premises storage and the public cloud as data backup destinations, depending on specific requirements and use cases.
hybrid cloud architecture - Hybrid cloud architecture is a type of cloud computing architecture that combines public cloud, private cloud and on-premises resources.
hybrid cloud management - Hybrid cloud management characterizes the processes and tools for managing applications that span public and private cloud computing infrastructure.
hybrid cloud security - Hybrid cloud security is the combination of technologies and practices that protect a hybrid cloud user's sensitive data, infrastructure and applications.
hybrid cloud storage - Hybrid cloud storage is an approach to managing cloud storage that uses both local and off-site resources.
hybrid ERP - Hybrid ERP is a combination of on-premises enterprise resource planning systems for managing essential business processes, such as financials and manufacturing, and cloud software for more specific functions.
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 (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 (HDD) and a NAND flash memory module.
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 work model - A hybrid work model is a workforce structure that includes employees who work remotely and those who work on site, in a company's facilities.
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.
hydraulics - Hydraulics is a mechanical function that operates through the force of liquid pressure.
hyperautomation - Hyperautomation is a framework and a set of advanced technologies for scaling automation in the enterprise.
hyperconverged appliance (HCI appliance) - A hyperconverged appliance (HCI appliance) is a hardware device that provides multiple data center management technologies within a single box.
HyperGrid - HyperGrid is a cloud computing provider that offers Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and application management services.
HyperTerminal - HyperTerminal is a communications and terminal emulation program that came with the Windows 98 and Windows XP operating systems.
Hypertext Transfer Protocol Secure (HTTPS) - Hypertext Transfer Protocol Secure (HTTPS) is a protocol that secures communication and data transfer between a user's web browser and a website.
