All articles A–Z
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Sobieski family
The Sobieski family (Polish: Sobiescy) was a Polish magnate family whose most famous member, Jan III Sobieski, ruled the Polish-Lithuanian Commonwealth from 1674 to 1696.
Sobkou Planitia
Sobkou Planitia is a 1,128 km wide volcanic smooth-plains region on Mercury in the Shakespeare (H-03) quadrangle, filling the ancient pre-Tolstojan Sobkou impact basin; IAU-approved 1976, named for an Ancient Egyptian messenger god.
Sobo, Katamuki and Okue Biosphere Reserve
Sobo, Katamuki and Okue Biosphere Reserve (祖母・傾・大崩ユネスコエコパーク), a UNESCO MAB biosphere reserve in Oita and Miyazaki prefectures, Kyushu, Japan, designated June 2017; 243,672 ha, 85 percent forest, six municipalities, home of the Japanese serow.
Sobol sensitivity analysis
Sobol sensitivity analysis is a variance-based method of global sensitivity analysis, introduced by I. M. Sobol' in 1990, that measures how much each input of a model contributes to output variance.
Sobolev inequality
The Sobolev inequality is a functional inequality in analysis, proved by Sergei Sobolev in 1938, bounding a function's L^q norm by the L^p norm of its gradient.
Sobolev space
A Sobolev space is a vector space of functions whose weak derivatives up to a given order lie in an L^p space, introduced by Sergei Sobolev in the 1930s.
Sobornoye Ulozheniye of 1649
The Sobornoye Ulozheniye of 1649 (Соборное уложение) is the comprehensive law code of Russia, adopted by the Zemsky Sobor under Tsar Alexei Mikhailovich and finalizing serfdom.
Sobot (智齿科技)
Sobot (智齿科技) is a Beijing enterprise software company founded in 2014 that sells an integrated customer-contact platform, including cloud call center, AI chatbots, live chat, ticketing, and BPO outsourcing.
Sobra Fluctus
Sobra Fluctus is a large lava flow field on Venus, about 700 km across, named by the IAU in 1997 after the Marindanim creator goddess of New Guinea.
Sobrados e Mucambos
Sobrados e Mucambos is a 1936 work of social history by Gilberto Freyre, tracing the decline of rural patriarchy in Brazil after the arrival of the Portuguese royal family in 1808.
Sobral
Sobral, Ceará, Brazil: municipality of 203,023 (2022 census) on the Acaraú River, 235 km from Fortaleza; founded as a vila in 1773, commercial hub of the northern backlands, site of the 1919 eclipse that confirmed general relativity.
Sobranie (Собрание)
Sobranie (Собрание), also known as Balkan Sobranie, is one of the world's oldest cigarette brands, registered in London in 1879 by Albert Weinberg and now owned by Japan Tobacco International.
Sobrarbe-Pirineos UNESCO Global Geopark
Sobrarbe-Pirineos UNESCO Global Geopark (Geoparque Mundial UNESCO Sobrarbe-Pirineos), designated 2015, covers all 2,202 km² of the Sobrarbe comarca in Huesca, Aragon, Spain; a Pyrenean geopark with the Monte Perdido limestone massif, in the network since 2006.
Sobre los ángeles
Sobre los ángeles ("Concerning the Angels") is a 1929 book of poems by Rafael Alberti, regarded as his first surrealist work and central to modern Spanish poetry.
Sobrevivo
Sobrevivo ("I Survive") is a 1978 collection of poems by Claribel Alegría, published in Havana, winner of the Casa de las Américas Prize for poetry.
Sobriety
Sobriety: abstinence from alcohol or drugs, clinically tied to recovery from alcohol use disorder (NIAAA definitions) and culturally to the sober curious movement, Dry January, temperance history, and mutual-help groups like AA and SMART Recovery.
Sobriety checkpoint
A sobriety checkpoint, also called a DUI checkpoint, is a roadblock where police stop vehicles on a systematic basis to screen drivers for impairment, without individualized suspicion.
Sobriquet
Sobriquet (variant soubriquet): a descriptive, often humorous or mocking nickname, borrowed into English in the 1640s from French soubriquet, originally "a chuck under the chin", of unknown origin.
Sōbuji rei
The Sōbuji rei (惣無事令), or order for a general peace, was a 1585 policy of Toyotomi Hideyoshi's government banning private warfare among the sengoku daimyo.
SOC 2
SOC 2 is an attestation framework from the AICPA under which a licensed CPA firm examines a service organization's controls for security, availability, processing integrity, confidentiality, or privacy.
SOC Telemed
SOC Telemed, founded as Specialists On Call in 2004, is a Reston, Virginia-based provider of acute care telemedicine to U.S. hospitals, taken private in 2022.
Sóc Trăng
Sóc Trăng (Sóc Trăng) is a coastal Mekong Delta province of Vietnam, capital Sóc Trăng city, 3,311.6 km², 1.31 million people (2015), 65% Kinh, 28% Khmer, 7% Hoa; merged into Can Tho city in 2025.
Soca Baptist
"Soca Baptist" is a 1980 soca song by Trinidad and Tobago's Blue Boy, later Superblue, fusing soca with Spiritual Baptist music and winning the 1980 Road March.
Soca Monarch (Antigua)
Soca Monarch, staged commercially as the Party Monarch, is Antigua Carnival's soca singing competition, first held in 1995 and split into fast-tempo Jumpy and melodic Groovy categories.
Soca music
Soca, a Carnival dance music genre from Trinidad and Tobago created by Lord Shorty (Garfield Blackman, Ras Shorty I) in the early 1970s as the "soul of calypso", fusing calypso with East Indian rhythms; originally spelled sokah; includes groovy, chutney, power, ragga, and parang subgenres.
Socar
Socar (쏘카) is a South Korean car sharing and mobility company founded in 2011 and headquartered in Jeju City, with more than 10 million members.
SOCAR Turkey
SOCAR Turkey, also written SOCAR Türkiye, is the Turkish arm of Azerbaijan's state-owned oil and gas company SOCAR, its largest asset being the STAR Refinery at Aliağa, opened in 2018.
SOCATA TBM
The SOCATA TBM, also called the Daher TBM, is a family of French pressurized single-engine turboprops built at Tarbes and flown since 1990, beginning with the TBM 700.
Socca (food)
Socca, also called farinata or fainá, is a thin chickpea-flour pancake from Nice, France, made of chickpea flour, water, olive oil, and salt, baked wood-fired at 280°C, gluten-free, and sold by the slice as street food.
Soccer Aid
Soccer Aid for UNICEF, founded 2006 by Robbie Williams and Jonathan Wilkes, is a UK charity football match, England XI vs Soccer Aid World XI, broadcast on ITV; it has raised over £137 million, including a record £16,462,353 in 2026.