A codefest, commonly referred to as a hackathon, is a collaborative coding event that unites computer programmers and other enthusiastic individuals to enhance or create a new software program.

https://www.techtarget.com/searchcio/definition/hackathon external-link

Hadoop Distributed File System

HDFS stands for the Hadoop Distributed File System, which is a specialized file system designed to handle massive datasets. It enables the distributed and fault-tolerant storage of vast amounts of data in various formats across a large number of machines. The data is redundantly stored across the cluster of machines to ensure data integrity.

https://www.databricks.com/glossary/hadoop-distributed-file-system-hdfs external-link

Hard link

A hard link is a reference to a file or directory in a file system that points directly to the physical location of the data on a storage device. It provides multiple paths or names to access the same file or directory without creating a duplicate copy.

https://www.techopedia.com/definition/11262/hard-link external-link

Health Level 7

Health Level 7 (HL7) is a group of international standards that facilitate the exchange of data between computer systems used by healthcare organizations. The term HL7 is used to refer to both the organization responsible for developing and supporting these standards, as well as to the versions 2.x and 3 of the standards, along with other standards developed by local HL7 organizations across more than 35 countries. The number 7 in the HL7 name corresponds to layer 7 of the ISO/OSI reference model for communication (ISO7498-1), signifying that the standard specifies communication at the application level.

https://hl7.de/ external-link

Helm Chart

A Helm chart is a collection of pre-configured Kubernetes resources that can be easily managed and deployed with the Helm tool. Charts offer a reproducible and shareable way of creating Kubernetes applications, ranging from simple resources like a memcached Pod to more complex stacks comprising HTTP servers, databases, caches, and more.

https://kubernetes.io/docs/reference/glossary/?all=true external-link

Hewlett Packard UniX

A operating system from Hewlett Packard, based on Unix.

https://it-gipfelglossar.hpi-web.de/hp-ux/ external-link

High Availabilty

High availability refers to a system or service that is designed to remain operational and accessible for an extended period, usually measured in terms of uptime. It involves implementing redundancy, fault tolerance, and failover mechanisms to minimize downtime and ensure continuous operation.

https://www.techtarget.com/searchdatacenter/definition/high-availability external-link

High Definition Television

High Definition Television (HDTV) refers to a digital television broadcasting system that provides a higher resolution and enhanced image quality compared to standard-definition television. It typically has a widescreen aspect ratio and delivers sharper and more detailed images, as well as improved audio quality

https://www.techtarget.com/whatis/definition/HDTV-high-definition-television external-link

High Speed Downlink Packet Access

UMTS-HSPA (High Speed Packet Access) enables laboratory downlink data rates of 14.6 Mbit/s and is also referred to as UMTS broadband.

https://it-gipfelglossar.hpi-web.de/hsdpa/ external-link

High Speed Packet Access

An extension of the UMTS standard allows for higher data transfer rates. This extension includes HSDPA for increasing the downlink data transfer rate and HSUPA for increasing the uplink data transfer rate.

https://it-gipfelglossar.hpi-web.de/hspa/ external-link

High-Performance Computing Cluster

HPCC is an open-source platform designed for distributed data processing, known for its utilization of a unified programming language called ECL and an architecture optimized for efficient data processing.

https://github.com/hpcc-systems/HPCC-Platform external-link

High-speed network

Also referred to as high-performance and ultra-high-performance networks, these are networks capable of delivering the required speed for comfortable and quality-assured utilization of services with demanding bandwidth requirements, regardless of the number of users. They are also designed to provide stable symmetric up and download rates in the future. While there is no standardized definition, bandwidths starting from 50 Mbps are generally mentioned. The service-related functionalities of these networks are independent of the underlying transmission technologies. Furthermore, they support general mobility by enabling consistent service provisioning for users everywhere.

Definition ITU-T, Y.2002 (10/2009): Next Generation Networks - Frameworks and functional architecture models, Recommendation 3.1.2, S.2


A historian is someone who is knowledgeable about the analysis and investigation of past occurrences.

https://www.indeed.com/career-advice/finding-a-job/what-is-a-historian external-link


The possession of one or more verifiable credentials allows an entity to carry out a role and create presentations based on them. The entity holding the credentials is usually, although not always, the subject of those credentials. Holders utilize credential repositories to keep their credentials stored.

https://gaia-x.gitlab.io/glossary/holder/ external-link

Home Gateway Initiative

HGI is an open industry forum that was initiated by leading European telecommunications companies and NTT from Japan, and later supported by several manufacturer companies. Its goal is the joint development of a requirement specification for home gateways.

https://www.homegatewayinitiative.org external-link

Home Grid Standard

The HomeGrid standard, also known as G.hn (G.9960, G.9961, G.9962, G.9963), is the most advanced technology for home networks. This technical standard was developed by the International Telecommunication Union (ITU) and is supported by the HomeGrid Forum and other organizations.

https://www.smart-energy.com/regional-news/north-america/g-hn-standard-approved/#:~:text=G.hn%20is%20a%20wired%20home%20networking%20standard%20that,%E2%80%93%20coaxial%20cable%2C%20phone%20lines%2C%20and%20power%20lines. external-link

Horizontal Pod Autoscaler

Horizontal Pod Autoscaler (HPA) is a Kubernetes API resource that automatically adjusts the number of replicas of a Pod based on targeted CPU utilization or custom metric targets. HPA is usually utilized with ReplicationControllers, Deployments, or ReplicaSets, and cannot be applied to objects that cannot be scaled, such as DaemonSets.

https://kubernetes.io/docs/reference/glossary/?all=true external-link

Horizontal Scaling

Horizontal scaling refers to the expansion of a system by adding additional resources, such as computers, servers, or network components, to increase performance and capacity. In horizontal scaling, workloads are distributed across the additional resources to enhance overall performance.

https://www.mongodb.com/basics/horizontal-vs-vertical-scaling#:~:text=What%20is%20horizontal%20scaling%3F,scale%20indefinitely%20once%20set%20up. external-link

Horizontal SW-platforms

Horizontal software platforms offer cross-industry services, in contrast to vertical software platforms that provide industry-specific functions. These horizontal platforms include services such as telephony or document management.

https://it-gipfelglossar.hpi-web.de/horizontale-sw-plattformen/ external-link

Hortonworks Data Platform

The Hortonworks Data Platform (HDP) is a data platform designed, developed, and built as a fully open system, providing organizations with the ability to implement a modern data architecture. It offers an enterprise-ready solution for data processing.

https://www.cloudera.com/products/hdp.html external-link


HostAliases is a Kubernetes feature that allows a user to define a mapping between IP addresses and hostnames that should be added to a Pod's /etc/hosts file. It is a configurable option that can be used to inject custom host-to-IP mappings into the container's networking namespace. However, this feature is not supported on Pods that are using the hostNetwork mode.

https://kubernetes.io/docs/reference/glossary/?all=true external-link

Human Capital Management

In an organization that supports human capital management (HCM), employees are viewed as assets with quantifiable value that can be increased using specific management techniques and HCM software tools.

https://www.personio.com/hr-lexicon/human-capital-management-hcm/ external-link

Human Data

Data that is produced by individuals through their utilization of digital technology (DT) services, including videos, audios, and emails.

https://www.citizenme.com/human-data/ external-link


A Human Machine Interface (HMI) is a device or system that allows individuals to interact with a technical device, serving as a functional bridge between humans and machines. HMI components typically encompass mechanical and electronic elements, along with a graphical user interface. Consequently, multiple scientific disciplines, ranging from computer science to ergonomics, address this field of study.

https://www.britannica.com/technology/human-machine-interface external-link

Hybrid Fiber Coax Networks

It is a technology in which the transmission of broadband analog and digital signals (such as television signals) takes place over cables. Initially, fiber optic cables are used (see: FTTC). At the endpoints of the fiber optic cables, the optical signals are converted into electrical signals, which are then transmitted to households via coaxial cables.

https://it-gipfelglossar.hpi-web.de/hfc-netze/ external-link

Hybrid OLAP

There are various techniques for storing multidimensional data structures, also known as OLAP cubes. These techniques include Multidimensional OLAP (MOLAP), Relational OLAP (ROLAP), and Hybrid OLAP (HOLAP). In the hybrid OLAP approach, HOLAP, data is stored partially in the database server and partially in the OLAP server.

http://www.itwissen.info/definition/lexikon/HOLAP-hybrid-OLAP.html external-link

Hypertext Transfer Protocol

To transfer data on the World Wide Web (WWW), the HTTP protocol is used. It is a simple protocol that defines a set of messages and responses (request/response) exchanged between a web client and web server during an HTML session. HTTP is described in RFC 2616 from 1999.

https://developer.mozilla.org/en-US/docs/Web/HTTP external-link