H

Hallucination

A phenomenon where an AI model generates information that is factually incorrect, nonsensical, or disconnected from the provided input.

ai

Hapi

A rich framework for building applications and services, known for its focus on configuration over code and its robust security features.

web

Harbor

An open-source trusted cloud-native registry project that stores, signs, and scans content.

cloud

Hard Disk Drive(HDD)

An electro-mechanical data storage device that uses magnetic storage to store and retrieve digital data using rapidly rotating platters.

hardware

Hard Fork

A radical change to a blockchain's protocol that makes previously invalid blocks/transactions valid, or vice versa, requiring all users to upgrade to the new version.

web

Hardware Security Module(HSM)

A physical computing device that safeguards and manages digital keys, performs encryption and decryption functions, and provides strong authentication.

security

Hardware Wallet

A physical device designed to securely store cryptocurrency private keys offline.

web

Harvard Architecture

A computer architecture with physically separate storage and signal pathways for instructions and data.

hardware

HDFS(HDFS)

A distributed file system designed to run on commodity hardware.

ai

HDMI(HDMI)

High-Definition Multimedia Interface; a proprietary audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data.

hardware

Headless CMS

A content management system that stores and manages content without a built-in frontend, making it accessible via an API for any device.

dev

Heatmap

A data visualization technique that shows magnitude of a phenomenon as color in two dimensions.

ai

Heat Sink

A passive heat exchanger that transfers heat generated by an electronic device to a fluid medium, often air or a liquid coolant.

hardware

Helm

A package manager for Kubernetes that simplifies the deployment and management of applications.

cloud

Hidden Markov Model(HMM)

A statistical model in which the system being modeled is assumed to be a Markov process with unobserved (hidden) states.

ai

Hierarchical Clustering

A method of cluster analysis which seeks to build a hierarchy of clusters.

ai

High Availability(HA)

A characteristic of a system which aims to ensure an agreed level of operational performance.

cloud

High Bandwidth Memory(HBM)

A high-performance RAM interface for 3D-stacked DRAM, used in high-end graphics cards and AI accelerators.

hardware

Highcharts

A mature, commercial JavaScript charting library used by many large organizations.

ai

HIPAA(HIPAA)

A US federal law that requires the creation of national standards to protect sensitive patient health information from being disclosed without the patient's consent or knowledge.

security

Histogram

A graphical representation that organizes a group of data points into user-specified ranges (bins).

ai

HODL

A term meaning to hold onto a cryptocurrency for the long term, regardless of market volatility.

web

Holdout Method

The simplest data splitting technique where the original dataset is divided into two or three parts: training, validation, and testing.

ai

Honeypot

A security mechanism set a up as a decoy to lure cyberattackers and detect, deflect, or study their methods.

security

Hop Count

The number of intermediate devices (routers) through which data must pass between source and destination.

network

Horizontal Pod Autoscaler(HPA)

A Kubernetes feature that automatically scales the number of Pods in a deployment based on observed CPU or memory usage.

cloud

HotStuff

A leader-based Byzantine Fault Tolerant consensus protocol that provides high throughput and low latency.

web

Hot Wallet

A cryptocurrency wallet that is connected to the internet, allowing for quick and easy access to funds.

web

HSRP(HSRP)

A Cisco proprietary redundancy protocol that allows multiple routers to appear as a single virtual gateway for hosts on a LAN.

network

HSTS(HSTS)

A security header that forces browsers to communicate with a website only over secure HTTPS connections.

security

HTML5

The fifth and current major version of the HTML standard used for structuring and presenting content on the World Wide Web.

web

HTML Templates

A mechanism for holding client-side content that is not to be rendered when a page is loaded but may subsequently be instantiated during runtime using JavaScript.

web

Hub

A basic networking device that connects multiple Ethernet devices together, making them act as a single network segment.

network

Hybrid Cloud

A computing environment that combines a private cloud with a public cloud.

cloud

Hydration

The process of attaching event listeners and state to static HTML that was rendered on the server.

web

Hyperparameter

A configuration setting for a machine learning algorithm that is set before the training process begins and cannot be learned from the data.

ai

Hyperparameter Tuning

The process of finding the optimal set of hyperparameters (settings that are not learned from the data) for a machine learning model.

ai

Hyper-threading

A technology used by Intel to improve parallelization of computations by allowing a single CPU core to act like two logical cores.

hardware

Hypervisor

Software that creates and runs virtual machines by isolating the operating system and resources from the physical hardware.

cloud

Hypothesis Testing

A statistical method used to decide whether the data at hand sufficiently support a particular hypothesis.

ai