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Hair iron
A hair iron, also known as a curling tong, is a hand-held electric appliance that reshapes hair, most commonly as a flat iron, curling iron, or crimping iron.
Hairpin
A hairpin is a pin or clip used to hold hair in place, ranging from a straight pin with a decorated head to the U-shaped bobby pin.
Haiyang (satellite series)
Haiyang (海洋, meaning ocean) is a Chinese series of civil ocean-monitoring Earth-observation satellites in four generations, HY-1 through HY-4, operated by NSOAS and developed by CAST, begun with HY-1A in 2002.
Haiyang nuclear power plant
Haiyang nuclear power plant (海阳核电站) is a nuclear power station on the coast of Haiyang, Shandong, China, known for China's first commercial nuclear district heating project and a desalination demonstration.
Haiyi (underwater glider)
Haiyi, also romanized Sea-Wing, is a series of underwater gliders developed by China's Shenyang Institute of Automation, which reached a record 6,329 m in the Mariana Trench in 2017.
Haizhou Li
Haizhou Li (李海洲) is a Singaporean speech and language technology researcher known for multilingual speech recognition and the Abacus engine, and Dean of the School of Artificial Intelligence at CUHK-Shenzhen.
Haj subsidy
The Haj subsidy was a Government of India program that offset part of the air travel cost of Muslim pilgrims flying to Saudi Arabia for the Hajj, abolished in 2018.
Haji Ali Dargah (حاجی علی درگاہ)
Haji Ali Dargah is a Sufi shrine and mosque on an islet off Mumbai's Worli coast, built in 1431 over the tomb of Pir Haji Ali Shah Bukhari.
Hajigabul-Gazakh-Saguramo Pipeline
The Hajigabul-Gazakh-Saguramo Pipeline, also known as Gazimammad-Gazakh-Saguramo or Kazakhi-Saguramo, is a Soviet-era trunk gas pipeline from Hajigabul, Azerbaijan, to Saguramo, Georgia, built in the late 1970s.
Hajigabul-Shirvanovka-Mozdok Pipeline
The Hajigabul-Shirvanovka-Mozdok Pipeline, also known as the Mozdok–Makhachkala–Kazi Magomed pipeline, is the only operating gas pipeline between Azerbaijan and Russia, completed in 1983 and reversed to carry Azerbaijani gas north in 2010.
Hajime (malware)
Hajime, Japanese for "beginning," is an IoT worm first reported in October 2016 that builds a decentralized peer-to-peer botnet on routers and cameras with weak Telnet credentials.
Hajiqabul–Astara–Abadan Gas Pipeline
The Hajiqabul–Astara–Abadan Gas Pipeline, formerly Kazi Magomed–Astara–Abadan, is a 1,475 km line from Azerbaijan to Abadan, Iran, built in 1970 and used since 2006 for gas swaps supplying Nakhchivan.
Hakka walled village
The Hakka walled village, most famously the tulou (土楼), is a fortified multi-storey rammed-earth dwelling built by the Hakka people in south-eastern China to shelter entire clans.
Hakuto (lunar rover)
Hakuto was a Japanese team in the Google Lunar XPRIZE, run by the startup ispace with Tohoku University, that built the SORATO lunar rover and won a $500,000 milestone prize.
HAL (Holistic Agent Leaderboard)
HAL (Holistic Agent Leaderboard) is a cost-aware, third-party leaderboard for evaluating AI agents, built by Benedikt Stroebl, Sayash Kapoor, and Arvind Narayanan at Princeton University and announced in 2025.
HAL Dhruv
The HAL Dhruv, formally the Advanced Light Helicopter, is a twin-engine utility helicopter built by Hindustan Aeronautics Limited of India, with 345 produced by 2024.
Hal Finney (computer scientist)
Hal Finney, born Harold Thomas Finney II, was an American cryptographer and early Cypherpunk who worked on PGP and received the first Bitcoin transaction from Satoshi Nakamoto in 2009.
HAL HF-24 Marut
The HAL HF-24 Marut was a 1960s Indian fighter-bomber developed by HAL and Kurt Tank. It was the first serial jet fighter created in Asia outside the Soviet Union.
HAL HJT-36 Yashas (यशस)
The HAL HJT-36 Yashas (यशस), formerly named Sitara, is a tandem-seat intermediate jet trainer built by Hindustan Aeronautics Limited to replace the Indian Air Force's HJT-16 Kiran.
HAL Prachand
The HAL Prachand, also known as the HAL Light Combat Helicopter, is India's first indigenously developed attack helicopter, built by Hindustan Aeronautics Limited for high altitudes.
HAL Rudra
The HAL Rudra, also known as the ALH-WSI, is India's first indigenously produced armed helicopter, an armed variant of the Dhruv built by Hindustan Aeronautics Limited.
HAL TEDBF
The HAL TEDBF, or Twin Engine Deck Based Fighter, is a planned twin-engine, canard-delta, carrier-based multirole fighter developed for the Indian Navy by ADA and HAL.
HAL Tejas
The HAL Tejas, also known as the LCA Tejas, is an Indian single-engine multirole light fighter built by Hindustan Aeronautics Limited for the Indian Air Force.
HAL Tejas Mk2
The HAL Tejas Mk2, also called the Medium Weight Fighter, is a 4.5-generation single-engine multirole fighter under development in India by HAL and the Aeronautical Development Agency.
Halabja chemical attack
The Halabja chemical attack was a chemical weapons bombardment of the Kurdish city of Halabja in northern Iraq by Iraqi forces on 16 March 1988, killing about 5,000 civilians.
Halahatang Oil Field
The Halahatang oil field (哈拉哈塘油田) is an ultra-deep oil field in China's Tarim Basin, producing from Ordovician carbonate reservoirs 7,000 to 8,000 meters deep, discovered in 2009.
Halara
Halara is a direct-to-consumer women's athleisure brand founded in 2020 by former software engineer Joyce Zhang, which grew through TikTok virality with a near-zero inventory model.
Halberd
A halberd, also called Hellebarde, is a two-handed polearm with an axe blade, top spike, and rear hook on a long shaft, developed in 14th-century Switzerland.
HALCA
HALCA (はるか) was a Japanese radio astronomy satellite and the first spacecraft to perform Very Long Baseline Interferometry from space, launched in February 1997 with an 8-meter radio telescope.
Halden reactor
The Halden reactor (Haldenreaktoren), formally the Halden Boiling Water Reactor, was a Norwegian research reactor used from 1959 to 2018 as an international test bed for nuclear fuel and materials.