All articles starting with O
9,097 articles
Óscar Romero
Óscar Arnulfo Romero y Galdámez, Archbishop of San Salvador from 1977, preached for the poor and was assassinated during Mass in 1980, canonized in 2018.
Oscar Salvatierra
Oscar Salvatierra Jr. (1935–2019) was an American transplant surgeon, chief of the UCSF transplant program and later a Stanford professor, who pioneered pediatric kidney transplantation and helped draft the National Organ Transplant Act of 1984.
Oscar Schlömilch
Oscar Schlömilch (1823–1901) was a German mathematician, professor in Dresden, founding editor of the Zeitschrift für Mathematik und Physik, and namesake of the Schlömilch series, an 1857 expansion in Bessel functions.
Oscar Schmidt
Oscar Schmidt (Mão Santa, 1958-2026), Brazilian basketball forward, all-time leading scorer with 49,737 points, Olympic record 55-point game, 1987 Pan Am gold over the USA, never played in the NBA.
Oscar selfie
The Oscar selfie: group photo taken by Bradley Cooper on Ellen DeGeneres's Samsung Galaxy Note 3 at the March 2, 2014 Academy Awards; posted by DeGeneres, it broke Obama's retweet record and hit over 3.4 million retweets.
Oscar Straus (politician)
Oscar Solomon Straus (1850–1926), American diplomat and politician, first Jewish US cabinet member as Secretary of Commerce and Labor under Roosevelt; three times envoy to Turkey, Hague arbitrator, League of Nations advocate.
Oscar Swahn
Oscar Gomer Swahn (1847–1927), Swedish running target (running deer) shooter; six Olympic medals 1908–1920; still the oldest Olympic gold medalist, medalist, and competitor.
Óscar Tabárez
Óscar Tabárez, in full Oscar Washington Tabárez Sclavo, is a Uruguayan football manager, nicknamed El Maestro, who coached Uruguay in four World Cups and won the 2011 Copa América.
Oscar the Grouch
Oscar the Grouch is the green Muppet grouch of Sesame Street, debuting 1969, originally orange, created by Jim Henson, performed by Caroll Spinney then Eric Jacobson, living in a trash can, loving trash, singing "I Love Trash."
Oscar Tshiebwe
Oscar Tshiebwe, born 1999 in the Democratic Republic of the Congo, is a Congolese basketball player for the Houston Rockets and unanimous National Player of the Year at Kentucky in 2022.
Oscar Underwood
Oscar Wilder Underwood was a Democratic politician from Alabama who led Democrats in both houses of Congress, wrote the Underwood Tariff Act of 1913, and ran for president in 1912 and 1924.
Óscar Valdez
Óscar Valdez (Óscar Rafael Valdez Fierro, born 1990), Mexican boxer, two-time Olympian and two-division world champion: WBO featherweight 2016-2019, WBC super featherweight 2021-2022; record 33-3-0, 24 KOs.
Oscar Verbeeck
Oscar André Verbeeck (1891–1971), Belgian football defender; 27 caps 1914–24, gold medal at the 1920 Antwerp Olympics, first-round exit 8-1 to Sweden in 1924; Club Brugge then Union Saint-Gilloise.
Oscar W. Greenberg
Oscar W. Greenberg is an American physicist who in 1964 introduced the three-valued quark charge now called color, resolving the spin-statistics paradox and providing an ingredient of quantum chromodynamics.
Oscar Wilde
Oscar Wilde (1854-1900), Irish playwright, poet, and novelist, champion of aestheticism; author of The Picture of Dorian Gray and The Importance of Being Earnest; imprisoned 1895 after the Queensberry trials.
Oscar Winning Tears
Oscar Winning Tears. is a 2023 RAYE song, track 2 on My 21st Century Blues, written with Mike Sabath, about a man's insincere tears after wronging her; Gold-certified in the UK and performed at the 2025 Grammys.
Oscar Zariski
Oscar Zariski, born Asher Zaritsky, was an American mathematician who rebuilt the foundations of algebraic geometry on commutative algebra, teaching at Johns Hopkins and then Harvard until 1969.
Oscar Zeta Acosta
Oscar Zeta Acosta (1935–disappeared 1974), Chicano attorney, author of Autobiography of a Brown Buffalo and Revolt of the Cockroach People, defender of the East L.A. 13, and Thompson's 'Dr. Gonzo', vanished off Mazatlán.
Oscar Zhang (张奥)
Oscar Zhang (张奥) is a Partner at Qiming Venture Partners focusing on healthcare investments; he joined the firm in 2015 and became Partner in 2024.
Oscar-class submarine
The Oscar-class submarine is a Soviet and Russian nuclear-powered cruise missile submarine class, known in Russia as Project 949 Granit and built to attack aircraft carrier groups.
Oscarstatuetten
Oscarstatuetten, the Oscar Mathisen Award, is a Norwegian speed skating honorary prize awarded annually since 1959 by Oslo Skøiteklub for the season's best achievement; not the film Oscar.
Oscarville, Georgia
Oscarville was a small community in Newbridge district, Forsyth County, Georgia, center of the 1912 racial terror that expelled over 1,000 Black residents; later linked to Lake Lanier legends.
OSCE (certification)
OSCE (Offensive Security Certified Expert) was an advanced OffSec penetration testing certification requiring a 48-hour hands-on exam; retired in 2020, it was replaced by OSCE³, granted with OSEP, OSWE, and OSED.
Osceola
Osceola (Asi-Yaholo, c. 1804–1838), born Billy Powell, was a Creek-born Seminole warrior, not a chief, who led resistance to Indian removal in the Second Seminole War, defeated U.S. forces at Withlacoochee, and died a prisoner at Fort Moultrie after capture under a flag of truce.
Osceola County, Florida, United States
Osceola County, Florida: county created May 12, 1887 from Orange and Brevard counties, Florida's 40th, named for Seminole leader Osceola. County seat Kissimmee; charter county; 481,718 residents (2025 est.); majority-Hispanic, fast-growing, south of Orlando.
Oschersleben Motorsport Arena
Motorsport Arena Oschersleben, formerly Motopark Oschersleben, is a permanent 3.667 km (3.696 km for cars since 2007) racing circuit in Saxony-Anhalt, Germany, opened 25 July 1997, hosting DTM, IDM, rallycross, and track days.
OSChina / Gitee (开源中国)
OSChina, also known as Gitee (开源中国), is a Shanghai company that operates a developer community and Gitee, a code-hosting and DevSecOps platform founded in 2008.
Oscillating water column
An oscillating water column (OWC) is a wave energy converter in which waves compress air in a chamber, driving a turbine and generator to produce electricity.
Oscillation
Oscillation is back-and-forth motion about an equilibrium position repeated at regular intervals; its study underlies waves, pendulum clocks, resonance, and examples from swings to vibrating atoms.
Oscillator strength
Oscillator strength, also called the f value, is a dimensionless measure of the strength of an allowed radiative transition between two quantum states of an atom, ion, or molecule.