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Hoysaleswara Temple (ಹೊಯ್ಸಳೇಶ್ವರ ದೇವಸ್ಥಾನ)
Hoysaleswara Temple (ಹೊಯ್ಸಳೇಶ್ವರ ದೇವಸ್ಥಾನ), also called Halebidu Temple, is a 12th-century Hindu temple to Shiva at Halebidu in Karnataka, India, part of a UNESCO World Heritage site.
Hoyt C. Hottel
Hoyt Clarke Hottel was an American chemical engineer at MIT from 1928 whose gas emissivity charts and solar energy research made furnace and solar heating design quantitative.
HP 9000
HP 9000 was a family of Unix servers and workstations produced by Hewlett-Packard from the early 1980s into the 2000s, running the HP-UX operating system.
HP DeskJet
HP DeskJet is a line of consumer inkjet printers sold by HP Inc. since 1988, built on the thermal inkjet technology HP and Canon invented in 1979.
HP EliteBook
HP EliteBook is a line of premium business notebooks sold by HP for large enterprises, launched in 2008 and known for durability testing and Sure Start self-healing BIOS.
HP Inc.
HP Inc. (HPQ), formerly Hewlett-Packard Company until the October 2015 renaming, is a Palo Alto-based personal computing and printing company with Personal Systems and Printing segments, $55.3 billion fiscal 2025 revenue, and a 1939 garage founding story.
HP Integrated Lights-Out
HP Integrated Lights-Out (iLO) is an embedded, out-of-band server management technology in HPE ProLiant servers that lets administrators remotely monitor, manage, and troubleshoot servers independent of the host OS.
HP LaserJet
HP LaserJet, also known as Hewlett-Packard LaserJet, is a line of laser printers made by HP since 1984, when the original became the first desktop laser printer.
HP Pavilion
HP Pavilion is a consumer computer brand sold by HP Inc. since 1995, when the Pavilion 5030 became HP's first multimedia PC designed for the home market.
HP ProBook
HP ProBook is a line of business-oriented notebook computers from HP Inc., introduced in April 2009, aimed at small and medium-sized businesses and positioned below the premium EliteBook line.
HP-12C
The HP-12C is a programmable financial calculator using Reverse Polish Notation, introduced by Hewlett-Packard on September 1, 1981, and still in continuous production as HP's longest-selling product.
HP-35
The HP-35 is a shirt-pocket-sized scientific calculator introduced by Hewlett-Packard in 1972 for $395, the first handheld able to compute the trigonometric, logarithmic, and exponential functions of a slide rule.
HP-42S
The HP-42S, also known as the HP-42S RPN Scientific, is a programmable RPN scientific calculator introduced by Hewlett-Packard in 1988 as a software-compatible successor to the HP-41C series.
HP-UX
HP-UX is Hewlett-Packard's Unix operating system for enterprise servers, running only on HP 9000 and Integrity Itanium hardware; its final release, 11i v3, lost support in 2025.
HP3 mole
The HP3 mole was a self-hammering probe of NASA's InSight lander, built by DLR to measure Martian heat flow, which failed to burrow past 37 centimeters by 2021.
HPBC
HPBC is a high-efficiency back-contact solar cell technology developed by the Chinese manufacturer LONGi, entering mass production in 2022 in the Hi-MO 6 module series.
HPCG
HPCG, the High Performance Conjugate Gradient benchmark, ranks high-performance computing systems by solving a sparse linear system, complementing the HPL benchmark used for the TOP500 list.
hping
hping is an open-source command-line packet generator and analyzer for TCP/IP networks, created by Salvatore Sanfilippo in 1998. Its current version, hping3, sends custom TCP, UDP, ICMP, and raw IP packets.
HPPO process
The HPPO process (hydrogen peroxide to propylene oxide) is an industrial route that makes propylene oxide from propylene and hydrogen peroxide over a titanium silicalite catalyst, producing only water as a co-product.
HPR1000
The HPR1000, marketed as Hualong One (华龙一号), is a Chinese third-generation pressurized water reactor developed jointly by CNNC and CGN; its first unit, Fuqing Unit 5, entered commercial operation in January 2021.
Hristo Tanev
Hristo Tanev is a natural language processing researcher at the European Commission's Joint Research Centre in Ispra, Italy, known for event extraction from news and social media.
HRP-2
HRP-2, also sold as HRP-2 Promet, is a 154 cm bipedal humanoid robot developed in Japan by AIST and Kawada Industries under METI's Humanoid Robotics Project, announced in 2002.
HRP-4
HRP-4 is a life-size humanoid robot developed by Kawada Industries with Japan's AIST and announced in 2010, a lighter, lower-cost successor to HRP-2 for research.
HRP-4C
HRP-4C is a feminine humanoid robot developed by Japan's AIST and unveiled in 2009, known publicly as a catwalk model, master of ceremonies, and singer named Miim.
HRP-5P
HRP-5P is a life-sized humanoid robot prototype developed by Japan's National Institute of Advanced Industrial Science and Technology, announced in 2018 to perform heavy labor autonomously.
Hrvatska elektroprivreda
Hrvatska elektroprivreda (HEP) is the Croatian state-owned electric power company established on 28 July 1990, which generates, transmits, and distributes electricity, supplies heat and gas, and co-owns the Krško nuclear plant in Slovenia.
Hrvatske željeznice
Hrvatske željeznice (Croatian Railways, abbreviated HŽ) is the national railway system of Croatia, formed in 1991 and split in 2006 into companies managing the 2,617 km network, passenger trains, and freight.
Hrvatski Telekom
Hrvatski Telekom, formerly HT – Hrvatske telekomunikacije, is Croatia's largest telecommunications company, headquartered in Zagreb, majority owned by Deutsche Telekom and traded on the Zagreb Stock Exchange.
HS Produkt Kuna
The HS Produkt Kuna is a compact Croatian submachine gun in 9×19 mm and .40 S&W, launched in the United States by Springfield Armory in 2025.
HS Produkt VHS
The HS Produkt VHS is a Croatian 5.56×45 mm NATO bullpup assault rifle made by HS Produkt and issued as the standard rifle of the Croatian Armed Forces.