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H3C
H3C (新华三, New H3C Technologies) is a Chinese provider of digital infrastructure and AI solutions, founded in 2003 and majority owned by Tsinghua-affiliated Unisplendour since 2015.
H4 robot
The H4 is a four-degree-of-freedom parallel robot proposed by François Pierrot and Olivier Company at LIRMM in 1999, giving three translations and one rotation for high-speed pick-and-place handling.
H5 inverter topology
The H5 inverter topology is a single-phase transformerless photovoltaic grid-connected inverter circuit proposed by SMA Solar Technology in 2005, adding a fifth switch to the H-bridge to suppress leakage current.
H6 (robot)
H6 is a prototype humanoid robot completed in June 2000 by Kawada Industries for the University of Tokyo's JSK Laboratory as a platform for full-body sensing and control research.
H6 inverter topology
The H6 inverter topology is a single-phase transformerless grid-tied inverter for photovoltaic systems, proposed in 2007 by Ingeteam, whose two extra switches suppress ground leakage current.
Ha-ha
A ha-ha, also known as a sunken fence or deer wall, is a hidden ditch and wall that keeps livestock out of a garden without interrupting the view.
Ha'penny Bridge
The Ha'penny Bridge, officially the Liffey Bridge (Droichead na Life), is a cast-iron pedestrian footbridge over the River Liffey in Dublin, opened in 1816 as Ireland's first iron bridge.
Ha'py Oil and Gas Field
Ha'py is a gas and condensate field in the Mediterranean Sea off Egypt's Nile Delta, discovered in 1996 by Amoco and IEOC and producing since March 2000.
Haarlemmermeer Polder
The Haarlemmermeer Polder (Haarlemmermeerpolder) is an 18,000-hectare reclaimed lake bed between Amsterdam, Haarlem, and Leiden, drained by three steam pumping stations between 1849 and 1852 and now occupied by farms and Schiphol Airport.
Haas Automation
Haas Automation is an American manufacturer of CNC machine tools founded by Gene Haas in 1983, and the largest machine tool builder in the United States.
Haas VF-26
The Haas VF-26 is a Formula 1 racing car built by the American Haas F1 Team, powered by Ferrari with Toyota Gazoo Racing branding, for the 2026 season, driven by Esteban Ocon and Oliver Bearman.
Habana del Este (housing development)
Habana del Este is the area of eastern Havana, Cuba, across the bay from the old city, where the revolutionary government concentrated its earliest state housing programs.
Haber process
The Haber process, known industrially as the Haber-Bosch process, combines nitrogen and hydrogen into ammonia, the dominant method of industrial nitrogen fixation and source of nearly all synthetic fertilizer.
Habitat (AI benchmark)
Habitat is an open-source 3D embodied AI simulation platform and benchmark suite by Meta AI, first presented at ICCV 2019, comprising Habitat-Sim and Habitat-Lab, and known for its speed.
Habitat 67
Habitat 67, Montréal (Cité du Havre, 2600 avenue Pierre-Dupuy): Moshe Safdie's 1965–1970 Expo 67 modular housing complex of 354 prefabricated concrete modules forming 158 apartments, post-tensioned, heritage-classed in Québec since 2009.
Habitat-Matterport 3D
Habitat-Matterport 3D is a dataset of 1,000 photorealistic 3D reconstructions of real indoor spaces, released by Meta AI and Matterport in 2021 for training embodied AI agents.
Habitation and Logistics Outpost
The Habitation and Logistics Outpost (HALO) was a pressurized module Northrop Grumman built as the first crew cabin, command center, and docking hub of NASA's planned Gateway lunar space station.
Habsburg Castle
Habsburg Castle, also known as Schloss Habsburg, is a castle above the Aare river in the Swiss canton of Aargau, built around 1020/1030 as the ancestral seat of the House of Habsburg.
Habshan
Habshan is an oil and gas field and processing complex in Abu Dhabi, United Arab Emirates, operated by ADNOC Gas and the origin of the pipeline to Fujairah.
Hachinohe LNG Terminal
Hachinohe LNG Terminal (八戸LNGターミナル) is a liquefied natural gas import terminal at Hachinohe Port, Aomori Prefecture, Japan, opened in April 2015 to supply northern Tohoku and eastern Hokkaido.
Hack (programming language)
Hack is a gradually typed programming language developed by Facebook for HHVM and released in 2014, designed to let PHP codebases adopt static typing file by file.
Hackathon
A hackathon, also known as a hack day, hackfest, or codefest, is a one-to-three-day event where teams collaborate to build a working software or hardware prototype.
Hacker
A hacker is a person with a strong interest in computers who explores and programs them; since the 1980s the word also means someone who breaks into systems.
Hacker culture
Hacker culture, also called hackerdom, is a subculture of playful, technically skilled exploration of computer systems that emerged at MIT in the late 1950s and shaped open source software.
HackerOne
HackerOne is an American software-as-a-service company founded in 2012 and based in San Francisco that connects organizations with security researchers who find software vulnerabilities for rewards.
HackerRank
HackerRank is a developer skills company offering coding assessments for technical hiring, founded in Bangalore in 2009 as InterviewStreet and serving over 26 million developers.
Hackers (film)
Hackers (1995) is an Iain Softley techno-thriller written by Rafael Moreu, starring Jonny Lee Miller and Angelina Jolie as teenage hackers framed for theft by The Plague; a box-office failure that became a cult classic.
HackingTeam
HackingTeam was a Milan-based Italian company, founded in 2003, that sold RCS spyware to government agencies until a 2015 breach exposed its client list and internal operations.
Hackney carriage
A hackney carriage, also known as a hackney cab or black cab, is a vehicle licensed in the United Kingdom to carry paying passengers without a prior booking.
Hacksaw
A hacksaw is a fine-toothed saw designed for cutting metal, consisting of a C-shaped frame with a handle and a tensioned blade; the power hacksaw is its motorized form.