All articles starting with O
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Ohio's congressional districts
Ohio's congressional districts: 15 U.S. House districts, also called the Ohio congressional map. Two 2022 maps were struck down as Republican gerrymanders; a new commission map adopted October 31, 2025 takes effect in 2026 through 2032.
OHL (company)
OHL (Obrascón Huarte Lain, S.A.), known since 2021 as OHLA, is a Spanish construction and infrastructure group based in Madrid, tracing its origins to a Bilbao firm founded in 1911.
Ohlin Island
Ohlin Island, also called Bailys Island, is a 170 m high uninhabited island in the Palmer Archipelago, Antarctica, about 11 km west of Tower Island, discovered by the Swedish Antarctic Expedition 1901–04 and named by Nordenskjöld for zoologist Axel Ohlin.
Ohlone
Ohlone (Costanoan): Indigenous peoples of the San Francisco Bay Area and central California coast, organized as about fifty autonomous village polities speaking eight related languages; missionized from 1769, declared extinct by Kroeber in 1925, but persisting today in tribes such as the Muwekma Ohlone.
Ohlone villages
Ohlone villages were the permanent and seasonal settlements of the Ohlone peoples of the San Francisco Bay Area, organized into about 50 independent tribes before the missions.
Ohm
The ohm (symbol Ω) is the SI derived unit of electrical resistance, equal to one volt per ampere, named for Georg Simon Ohm, who published Ohm's law in 1827.
Ohm Shanthi Oshaana (ഓം ശാന്തി ഓഷാന)
Ohm Shanthi Oshaana (ഓം ശാന്തി ഓശാന), also spelled Om Shanti Oshana, is a 2014 Malayalam coming-of-age romantic comedy directed by Jude Anthany Joseph, starring Nazriya Nazim and Nivin Pauly, with music by Shaan Rahman; it won three Kerala State Film Awards.
Ohm Stock Broker Pvt. Ltd.
Ohm Stock Broker Pvt. Ltd. is a privately held Indian financial services company in Mumbai, founded by Amal Parikh in 1999, offering equity broking and SEBI-registered portfolio management.
Ohm's law
Ohm's law, first published by German physicist Georg Simon Ohm in 1827, states that current through a conductor is directly proportional to voltage, written V = IR.
Ohmic contact
An ohmic contact is a metal-semiconductor junction that passes current in either direction with a linear, non-rectifying response, connecting devices to circuits; heavy doping makes carriers tunnel through the barrier.
Ohne furcht und adel
Ohne Furcht und Adel (Citadels), Bruno Faidutti's 2000 hidden-role card game published by Hans im Glück, Spiel des Jahres 2000 nominee; players secretly draft characters like Assassin and King, collect gold, and build districts to win.
OhnePixel
OhnePixel (Mark Zimmermann), German Counter-Strike 2 skins streamer and YouTuber; HLTV Streamer of the Year 2023 and 2024, DRILLAS coach, SkinBid co-owner.
Ohništ'any
Ohništ'any (Ohnišťany), Czech village in Hradec Králové District with a Roman-period cemetery recorded in Barrington Atlas 12 I2 and Pleiades; eight graves, Roman-provincial imports, first mentioned 1318.
Ohno Satoshi
Ohno Satoshi (大野智), born 1980 in Tokyo, is a Japanese singer, actor, and artist best known as leader and lead vocalist of the idol group Arashi, which debuted in 1999.
Ohnsorg-Theater
The Ohnsorg-Theater is a Hamburg folk theater performing almost exclusively in Low German. Founded in 1902, it became nationally famous through NDR television broadcasts from 1954.
Oho Enthan Baby (ஓஹோ எந்தன்பேபி)
Oho Enthan Baby (ஓஹோ எந்தன் பேபி) is a 2025 Tamil romantic comedy drama directed by Krishnakumar Ramakumar, starring debutant Rudra, Vishnu Vishal's brother, with Mithila Palkar; released 11 July 2025 and streamed on Netflix from 8 August 2025.
Ohogetsu Corona
Ohogetsu Corona is a 175-km-wide corona on Venus at 27.0S, 85.7E in Aino Planitia, named in 1994 for a Japanese food goddess, adjacent to Aramaiti Corona and among the region's most stratigraphically complex coronae.
Ohrid
Ohrid (Охрид) is a lakeside city in southwestern North Macedonia, ancient Lychnidos, core of the transboundary Lake Ohrid UNESCO World Heritage property, with the oldest Slav monastery, 800+ Byzantine icons, and over 200 endemic lake species.
Ohrid Fest
Ohrid Fest (Охрид Фест) is an international music festival held each August in Ohrid, North Macedonia, founded by composer Grigor Koprov, first held in 1994.
Ohrid Literary School
The Ohrid Literary School was a center of Slavic literacy in Ohrid, active from 886 to 916 under Clement of Ohrid and Naum of Preslav.
Ohrid-Prespa Biosphere Reserve
Ohrid-Prespa Biosphere Reserve, a UNESCO transboundary biosphere reserve designated in 2014 across Albania and North Macedonia, covering the Ohrid and Prespa lakes, their endemic-rich waters, karst hydrology, and shared conservation challenges.
OHSAS 18001
OHSAS 18001 was a specification standard for occupational health and safety management systems, first published in 1999 and withdrawn in 2021 after replacement by ISO 45001.
Ohthere of Hålogaland
Ohthere of Hålogaland (Ottar fra Hålogaland), a ninth-century Norwegian merchant-seafarer, reported his voyages to King Alfred c. 890; preserved in the Old English Orosius with the earliest Germanic mention of Norðweg (Norway).
Ohyun Kwon
Ohyun Kwon is an American-based organic chemist and UCLA professor known for deconstructive radical chemistry cleaving alkene C–C bonds, including hydrodealkenylation and aminodealkenylation published in Science.
Oi
Oi is a Brazilian telecommunications company, once the country's largest fixed-line carrier under the name Telemar, decreed bankrupt in 2025 after two judicial reorganizations, with bankruptcy confirmed in 2026.
Oi (interjection)
Oi (interjection) is an informal, usually impolite British English call for attention, /ɔɪ/, derived from hoy via h-dropping; distinct from Yiddish oy and from the Oi! punk genre.
Ōi Kentarō
Ōi Kentarō (大井憲太郎) was a Japanese politician who led the radical wing of the Freedom and People's Rights Movement and organized the 1885 Osaka Incident.
Oi no Kobumi
Oi no Kobumi (笈の小文, "Small Writings from the Pack") is a haibun travel record by Matsuo Bashō, describing his journey from Edo to Kyoto in 1687–1688.
Ōi Nuclear Power Plant
The Ōi Nuclear Power Plant (大飯発電所) is a nuclear power station in Ōi, Fukui Prefecture, Japan, owned and operated by the Kansai Electric Power Company.
Oi!
Oi! is a British street-punk subgenre of the late 1970s and early 1980s, named after the Cockney Rejects song "Oi! Oi! Oi!" and coined by Garry Bushell; working-class, skinhead-linked chant punk wrongly conflated with racist white power music.