All articles starting with O
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Ons Klyntji
Ons Klyntji ("our little one") was the first magazine in Afrikaans, published monthly in Paarl, South Africa, from 1896 until around 1905, and revived in the 1990s as a protest zine.
Onsager reciprocal relations
The Onsager reciprocal relations, derived by Lars Onsager in 1931, are symmetry relations stating that the cross-coefficients in linear transport laws near equilibrium are equal in both directions.
Onsen (温泉)
Onsen (温泉) are Japanese hot springs and the bathing facilities built on them, legally defined by the 1948 Hot Spring Law, distinct from sento public baths, with over 2,300 facilities, nude bathing etiquette, and a toji spa-cure tradition.
Onshape
Onshape is a cloud-based CAD and product data management platform that runs entirely in a web browser, founded in 2012 and acquired by PTC in 2019.
Onshō (reward system)
Onshō (恩賞) was the Kamakura shogunate's system of rewarding warriors for merit with land, court rank, or tax rights, strained by the Mongol invasions of 1274 and 1281.
Onshōgata
The Onshōgata (恩賞方) was the office that investigated military merit and awarded warriors land and posts in the Kenmu government and later the Ashikaga bakufu, succeeding the Kamakura-era Ontaku-bugyō.
Onsi Sawiris
Onsi Sawiris (أنسى ساويرس) was an Egyptian industrialist, born in 1930 in Sohag, who founded the Orascom group in 1976 and built a construction-to-telecom empire run by his three sons.
Onside kick
Onside kick: a short kickoff the kicking team tries to recover itself. NFL recovery rates fell from 21.2% (1992-2017) to 7.7% in 2018 after rule changes; 2024-2026 rules restrict and then relax when it can be declared.
Onslaught (film)
Onslaught (2026) is an A24 action-horror film directed by Adam Wingard, written by Simon Barrett, starring Adria Arjona as a sniper protecting her daughter from escaped super soldiers; released September 4, 2026.
Onslaught (Marvel Comics)
Onslaught is a Marvel Comics psionic supervillain formed from Xavier's absorption of Magneto's dark ego, first fully appearing in X-Men #53 (1996), star of the 1996 crossover that removed the Avengers and Fantastic Four.
Onslow County
Onslow County, North Carolina: coastal county formed 1734, seat Jacksonville, home of Camp Lejeune (1941), 204,576 residents in 2020, over 30 miles of beaches, named for Arthur Onslow.
OnStage TV (Jamaica)
OnStage TV is a Jamaican entertainment television magazine show focused on dancehall and reggae, developed by host and producer Winford Williams in 1997 and known for long-form artist interviews.
OnStar
OnStar Corporation is General Motors' subscription telematics system, launched in 1996 as the auto industry's first embedded platform, offering automatic crash response, navigation, and stolen vehicle recovery.
ONT Field
ONT Field is a 6,000-seat baseball stadium in Ontario, California, home of the Ontario Tower Buzzers, Dodgers Single-A affiliate, named under a ten-year OIAA-Legends Global naming rights deal capped at $1.2 million annually.
Ontakesan
Ontakesan (御嶽山), or Mount Ontake, is Japan's second highest volcano at 3,067 m on the Nagano-Gifu border, a stratovolcano with phreatic eruptions in 1979, 1991, 2007, and the deadly 2014 eruption that killed about 57 hikers.
Ontal
Ontal are a Serbian industrial techno and rhythmic noise duo formed in Subotica in 2011 by Boris Brenecki (Noiz) and Darko Kolar (Katran), who have released albums on Ad Noiseam and HANDS.
Ontario
Ontario, Canada's most populous province (16.3 million, 39.0% of Canada; GDP $1.25 trillion, 38.4% of national), a 1867 Confederation founder with Toronto as capital, 124-seat legislature, nuclear-heavy electricity grid, and 46 treaties with Indigenous nations.
Ontario Energy Board
The Ontario Energy Board is the independent economic regulator of Ontario's electricity and natural gas sectors, empowered by provincial statute to set utility rates, license participants, and protect consumers.
Ontario Health
Ontario Health (Santé Ontario), agency created 2019 by the Government of Ontario to connect, coordinate and modernize health care; absorbed Cancer Care Ontario, Trillium Gift of Life Network and 14 LHINs; six regional teams, Ontario Health atHome subsidiary.
Ontario Heritage Act
Ontario Heritage Act (OHA), R.S.O. 1990 c. O.18: Ontario statute enacted 1975 enabling municipal designation of individual heritage properties (Part IV, s. 29) and heritage conservation districts (Part V), plus ministerial provincial designations and Stop Orders.
Ontario Highway 11
Ontario Highway 11 (ON 11) is a provincial highway in Ontario, Canada, running about 1,784 km from near Barrie to Rainy River at the Minnesota border.
Ontario Highway 17
Ontario Highway 17, also called Ontario Provincial Highway 17, is the provincial highway carrying the Trans-Canada Highway over 2,100 km from Ottawa to the Manitoba border.
Ontario Highway 401
Ontario Highway 401, officially the Macdonald-Cartier Freeway, is an 818 km controlled-access freeway across southern Ontario from Windsor to the Quebec boundary, passing north of Toronto.
Ontario Highway 407
Ontario Highway 407 (407 ETR) is a 151 km all-electronic toll highway. It opened in 1997 and is notable as the first worldwide toll road without physical booths.
Ontario Highway 427
King's Highway 427 is a 26.1 km urban freeway running from Evans Avenue in Toronto to Major Mackenzie Drive in Vaughan, connecting the QEW to Highways 401 and 407.
Ontario Highway 7
Ontario Highway 7, designated in 1920, is a 534.6 km provincial highway across southern Ontario from near London toward Ottawa, split into two legs after GTA sections were downloaded.
Ontario Hockey League
Ontario Hockey League (OHL), major junior hockey league of 20 teams in Ontario, Michigan, and Pennsylvania; a Canadian Hockey League member whose clubs compete for the J. Ross Robertson Cup and supply NHL and U SPORTS talent.
Ontario International Airport
Ontario International Airport (ONT) is a public international airport in Ontario, California, about 35 miles east of downtown Los Angeles, owned since 2016 by the Ontario International Airport Authority.
Ontario Lacus
Ontario Lacus, Titan's largest southern-hemisphere hydrocarbon lake, near 72°S 183°W; about 235 km long, ethane-rich, shallow, named after Lake Ontario, studied by Cassini ISS, VIMS, and RADAR.
Ontario Liberal Party
Ontario Liberal Party, provincial liberal party of Ontario, Canada. Founded via George Brown and Edward Blake; governed under Mowat, Hepburn, Peterson, McGuinty, and Wynne; fell to 7 seats in 2018 and 8 in 2022, losing official party status.