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HL-1M
HL-1M was a medium-sized Chinese tokamak operated at the Southwestern Institute of Physics in Chengdu from 1994, created by upgrading the earlier HL-1 tokamak; its experiments formed the basis for the successor device HL-2A.
HL-2A
HL-2A is a medium-sized divertor tokamak at the Southwestern Institute of Physics in Chengdu, China, built partly from the former German ASDEX tokamak, with first plasma in 2002.
HL-2M
HL-2M, officially renamed HL-3, is a medium-sized copper-conductor tokamak built by the Southwestern Institute of Physics in Chengdu, achieving its first plasma in December 2020.
HL-3
HL-3 (中国环流三号), formerly known as HL-2M, is a tokamak at the Southwestern Institute of Physics in Chengdu, China, that reached electron temperatures above 160 million degrees.
HL-GA Battery Company LLC
HL-GA Battery Company LLC is a Hyundai Motor Group and LG Energy Solution joint venture formed in 2023 to build a 30 GWh battery cell plant in Bryan County, Georgia.
HL7
HL7, or Health Level Seven International, is an ANSI-accredited standards organization founded in 1987 that creates interoperability standards for exchanging healthcare data, best known for V2 messaging, CDA, and FHIR.
HLSL
HLSL, or High-Level Shading Language, is a C-based shading language developed by Microsoft for writing GPU shaders in DirectX, introduced with DirectX 9.0 in 2003.
HM Prison Millsike
HM Prison Millsike, also known as HMP Millsike, is a Category C resettlement prison for men in Full Sutton near York, England, opened in 2025 with about 1,500 places.
HM-14
HM-14, formally Helicopter Mine Countermeasures Squadron 14 and nicknamed the Vanguard, was a United States Navy squadron at Norfolk that towed minesweeping gear from heavy helicopters, 1978 to 2023.
HM-15
HM-15, Helicopter Mine Countermeasures Squadron 15, is a US Navy helicopter squadron nicknamed the Blackhawks that flies the MH-53E Sea Dragon on airborne mine countermeasures missions.
HMAC
HMAC (hash-based message authentication code) is a message authentication mechanism that combines a cryptographic hash function with a shared secret key, specified in RFC 2104 in 1997.
HMAS Melbourne (R21)
HMAS Melbourne (R21) was a Majestic-class light aircraft carrier of the Royal Australian Navy and its flagship from 1955 until 1982, ramming and sinking two destroyers.
HMD Barbie Phone
The HMD Barbie Phone is a pink flip feature phone developed by HMD with Mattel and launched in 2024, offering calls, texts, and Barbie-themed software without social media apps.
HMD Global
HMD Global Oy, branded as Human Mobile Devices, is a Finnish mobile phone company founded in 2016, headquartered in Espoo, that makes Nokia-branded phones under license.
HMH (drilling equipment company)
HMH is a Houston-based manufacturer of drilling equipment such as top drives and pressure control systems, formed in 2021 by merging Baker Hughes' drilling business with MHWirth.
HMHS Britannic
HMHS Britannic was the third and last of White Star Line's Olympic-class liners, serving as a British hospital ship before sinking in the Aegean Sea in 1916.
HMM (shipping company)
HMM Co., Ltd. (에이치엠엠), formerly Hyundai Merchant Marine, is a South Korean container shipping company headquartered in Seoul. Founded in 1976, it surpassed 1 million TEU of container fleet capacity in 2025.
HMS Agincourt (1913)
HMS Agincourt, the former Ottoman battleship Sultan Osman I, was a British dreadnought carrying fourteen 12-inch guns, fought at Jutland in 1916, and was scrapped in 1924.
HMS Argus (I49)
HMS Argus was a Royal Navy aircraft carrier completed in 1918, converted from an unfinished Italian liner and considered the first true carrier with a full-length flight deck.
HMS Ark Royal (91)
HMS Ark Royal (91) was a fleet aircraft carrier of the British Royal Navy, commissioned in 1938 and sunk by a German submarine in 1941.
HMS Ark Royal (R07)
HMS Ark Royal (R07) was the third and final Invincible-class light aircraft carrier of the Royal Navy, in service from 1985 to 2011 and nicknamed "The Mighty Ark".
HMS Ark Royal (R09)
HMS Ark Royal (R09) was an Audacious-class Royal Navy aircraft carrier commissioned in 1955, the last British conventional fixed-wing carrier when she paid off in 1978.
HMS Barham (04)
HMS Barham was a Queen Elizabeth-class fast battleship of the British Royal Navy that fought at Jutland in 1916 and was sunk by the German submarine U-331 in November 1941.
HMS Beagle
HMS Beagle was a 10-gun Royal Navy brig, launched in 1820, that made three scientific surveys, most famously the circumnavigation of 1831–1836 carrying the naturalist Charles Darwin.
HMS Birkenhead (1845)
HMS Birkenhead, launched as Vulcan, was a Royal Navy iron paddle troopship sunk off South Africa in 1852, giving rise to the "women and children first" Birkenhead Drill.
HMS Bounty
HMS Bounty, also known as HMAV Bounty, was a small British naval vessel bought in 1787 to carry breadfruit from Tahiti, famous for the 1789 mutiny led by Fletcher Christian.
HMS Challenger (1872)
HMS Challenger was a Royal Navy wooden screw corvette converted in 1872 into a floating laboratory for the first major oceanographic expedition, a three-and-a-half-year circumnavigation.
HMS Courageous (50)
HMS Courageous was a First World War light cruiser converted into a Royal Navy aircraft carrier, torpedoed and sunk by U-29 off Ireland in September 1939.
HMS Coventry (D118)
HMS Coventry (D118) was a Royal Navy Type 42 destroyer sunk by Argentine A-4 Skyhawks on 25 May 1982 during the Falklands War, with 19 dead.
HMS Dreadnought (1875)
HMS Dreadnought, laid down as Fury in 1870, was a Royal Navy ironclad turret battleship launched in 1875 that served in the Mediterranean and was sold for scrap in 1908.