All articles starting with S
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Single Integrated Operational Plan
The Single Integrated Operational Plan (SIOP) was the U.S. strategic nuclear war plan from 1960 to 2003, produced by the JSTPS with the NSTL target list, first as SIOP-62, later replaced by OPLAN 8044 and OPLAN 8010.
Single Ladies (Put a Ring on It)
Single Ladies (Put a Ring on It) is a 2008 Beyoncé single from I Am... Sasha Fierce, written with Tricky Stewart and The-Dream; it topped the Billboard Hot 100 for four weeks and won three 2010 Grammys including Song of the Year.
Single Ladies (TV series)
Single Ladies (2011–2015) is a VH1 comedy-drama, the network's first hour-long scripted series, produced with Queen Latifah's Flavor Unit. Set in Atlanta, it starred Stacey Dash, LisaRaye McCoy, Charity Shea, and Denise Vasi across four seasons and 52 episodes.
Single malt Scotch
Single malt Scotch whisky is Scotch distilled at one distillery from water and malted barley only, in copper pot stills, matured in Scotland at least three years, bottled at 40% ABV minimum.
Single malt whisky
Single malt whisky is whisky distilled in pot stills at one distillery from water and malted barley alone; legally defined for Scotch, matured three years in oak casks up to 700 litres, and now produced worldwide.
Single market
A single market, also called an internal market, is an integrated economic area where goods, services, capital, and people move freely; the EU launched its single market in 1993.
Single mixed refrigerant process
The single mixed refrigerant process is an LNG liquefaction cycle in which one closed loop of a mixed refrigerant cools natural gas, best known as Black & Veatch's PRICO process.
Single Model Large Ensemble
A single model large ensemble, formally a single-model initial-condition large ensemble (SMILE), is a set of many climate simulations run with one climate model under one forcing scenario.
Single non-transferable vote
Single non-transferable vote (SNTV): one candidate-centered vote per voter in multi-member districts, top vote-getters elected; semi-proportional; used in Japan 1947-1993, South Korea, Taiwan, Jordan, Afghanistan, Vanuatu.
Single organ vasculitis
Single organ vasculitis (SOV), per the 2012 Chapel Hill nomenclature, is vasculitis of any vessel size confined to one organ without systemic vasculitis; focal forms are often cured by resection, diffuse forms need immunosuppression.
Single Papa
Single Papa is a 2025 Hindi Netflix comedy-drama, six episodes, starring Kunal Kemmu as divorced man-child Gaurav Gehlot who adopts baby Amul; created by Ishita Moitra and Neeraj Udhwani, renewed for Season 2 in January 2026.
Single parent
Single parent: a person raising children without a co-resident spouse or partner, also called lone parent. Definitions vary by agency; about 25% of US children and 10-25% of OECD children live in single-parent households.
Single Parents (TV series)
Single Parents (シングル・ペアレンツ) is an ABC sitcom created by Liz Meriwether and J.J. Philbin, starring Taran Killam and Leighton Meester as single parents; 45 episodes, 2018–2020, cancelled after two seasons.
Single person
Single person: an unpartnered adult, often in a one-person household. Distinguished from living alone, social isolation, and loneliness; US one-person households reached 29% in 2025.
Single pivot suspension
Single pivot suspension is a bicycle rear suspension design in which a swingarm rotates about a single pivot on the main frame, with a shock absorber controlling its motion.
Single point mooring
A single point mooring, or SPM, is an offshore buoy or fixed tower where tankers moor and load or unload liquid cargo, swinging freely with wind and current.
Single point of failure
A single point of failure (SPOF), also called a central point of failure, is any component whose own failure stops a system or critical function from operating.
Single Quiver
Single Quiver is a Basque Country surf, skate, and paddle surf retailer (singlequiver.com), founded in Leioa, with physical stores in Barakaldo and El Puerto de Santa María, selling surfboards, wetsuits, Carver and YOW surfskates, and SUP gear.
Single Resolution Board
The Single Resolution Board (SRB) is the EU agency, created in 2014, that decides how failing euro-area banks are resolved and manages the 78-billion-euro Single Resolution Fund.
Single Salma
Single Salma (सिंगल सलमा) is a 2025 Hindi rom-com-drama directed by Nachiket Samant, starring Huma Qureshi as a 33-year-old Lucknow engineer; released theatrically 31 October 2025 and on Netflix December 2025.
Single scattering albedo
The single scattering albedo (SSA) is the fraction of light removed from a beam by scattering rather than absorption, ranging from 0 for pure absorption to 1.
Single sign-on
Single sign-on (SSO) is an authentication arrangement where a user authenticates once to an identity provider and then obtains services from multiple applications without presenting credentials again to each one.
Single skating
Single skating: men's and women's singles figure skating, an ISU discipline of solo jumps, spins, and footwork. Two programs (2:50 short, 4:00 free), scored since 2004 under the IJS point system with TES, GOE, and components.
Single source of truth
Single source of truth (SSOT): a data management principle naming one authoritative system per business fact, with all other systems holding copies. Covers implementation patterns, MDM relationship, risks, and data mesh alternatives.
Single spontaneous delivery
Single spontaneous delivery (ICD-11 JB20; ICD-10 O80): birth of one neonate by unassisted, nonoperative vaginal delivery without induction, instruments, or cesarean; subcategories JB20.0 vertex and JB20.1 breech.
Single Supervisory Mechanism
The Single Supervisory Mechanism (SSM) is the system under which the European Central Bank directly supervises the largest euro area banks, operating since November 2014.
Single system image
Single system image (SSI) is a computing paradigm that makes a cluster of machines appear to users and applications as one large, unified computer, hiding the underlying distributed resources.
Single top-quark production
Single top-quark production is the electroweak creation of one top quark rather than a pair, through the Wtb vertex, first observed at Fermilab's Tevatron in 2009.
Single transferable vote
The single transferable vote (STV) is a proportional electoral system in which voters rank candidates in multi-member constituencies and seats fill by quota, used in Ireland, Malta, and Australia.
Single transverse palmar crease
Single transverse palmar crease, also called single palmar crease or formerly simian crease, is a fusion of the two transverse palm creases into one line, seen in about 1 in 30 people, twice as often in males, and associated with Down syndrome and other conditions.