Scientists, inventors and mathematicians
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- Sam TreimanAmerican physicist
- Samuel MorseAmerican inventor and painter (1791–1872)
- Samuel WilberforceBishop of Oxford, England (1805–1873)
- Santiago Ramón y CajalSpanish neuroscientist (1852–1934)
- Sara Elisabeth MoræaSara Elisabeth "Sara Lisa" von Linné (née Moræa; 26 April 1716 – 20 April 1806) was marrie
- SarcosineSarcosine, also known as N-methylglycine, or monomethylglycine, is a amino acid with the f
- Satosi WatanabeSatosi Watanabe (渡辺 慧, Watanabe Satosi, 26 May 1910 – 15 October 1993) was a theoretical p
- Satyendra Nath BoseIndian theoretical physicist (1894–1974)
- Satyendranath BosuSatyendra Nath Bosu (aka. Satyendranath Bose or Satyen Bose; 30 July 1882 – 21 November 19
- Saude, IowaSaude is an unincorporated community in northern Chickasaw County, in the U.S. state of Io
- Scientific priorityCredit for first discovery
- Secular clergyDeacons and priests who are not members of religious orders
- Septimal tritoneA septimal tritone is a tritone (about one half of an octave) that involves the factor sev
- Sergeant Major of the Marine CorpsThe sergeant major of the Marine Corps (officially abbreviated to SMMC) is a billet, as we
- Sergei KorolevSoviet aerospace engineer (1907–1966)
- ShadowgraphOptical method to reveal non-uniformity
- Shockley diodeThe Shockley diode (named after physicist William Shockley) is a four-layer semiconductor
- SiddhantaTerm from Indian philosophy
- Sidney DancoffSidney Michael Dancoff (September 27, 1913 in Philadelphia – August 15, 1951 in Urbana, Il
- Siegfried CzapskiSiegfried Czapski (28 May 1861 – 29 June 1907) was a German physicist and optician.
- SilveringApplication of reflective coatings to mirrors
- Siméon Denis PoissonFrench mathematician and physicist (1781–1840)
- Simone MelchiorSimone Cousteau (née Melchior; 19 January 1919 – 1 December 1990) was a French explorer. S
- Sir Benjamin Collins Brodie, 2nd BaronetSir Benjamin Collins Brodie, 2nd Baronet FRS (5 February 1817 – 24 November 1880) was an E
- Slater integralsIn mathematics and mathematical physics, Slater integrals are certain integrals of product
- Slater–Pauling ruleIn condensed matter physics, the Slater–Pauling rule states that adding an element to a me
- Slater's rulesIn quantum chemistry, Slater's rules provide numerical values for the effective nuclear ch
- Smith–Helmholtz invariantIn optics the Smith–Helmholtz invariant is an invariant quantity for paraxial beams propag
- Société mathématique de FranceThe Société Mathématique de France (SMF) is the main professional society of French mathem
- Sofya KovalevskayaRussian mathematician (1850–1891)
- Spherical trigonometryGeometry of figures on the surface of a sphere
- Spin isomers of hydrogenSpin states of hydrogen
- Srinivasa RamanujanIndian mathematician (1887–1920)
- St Margaret's, LeeSt. Margaret's Church, Lee, is a Church of England parish church in Lee, London. It was bu
- Standard Telecommunication LaboratoriesStandard Telecommunication Laboratories was the UK research centre for Standard Telephones
- Stefan BanachPolish mathematician (1892–1945)
- SteglitzSteglitz (German: ) is a locality of the Steglitz-Zehlendorf borough in Southwestern Berli
- Stephen HawkingEnglish theoretical physicist (1942–2018)
- Stephen Jay GouldAmerican biologist and historian of science (1941–2002)
- Steve WozniakAmerican engineer and programmer (born 1950)
- Strychnine total synthesisStrychnine total synthesis in chemistry describes the total synthesis of the complex biomo
- Studia MathematicaStudia Mathematica is a triannual peer-reviewed scientific journal of mathematics publishe
- Su SongPolymath (1020–1101)
- Sudeten GermansEthnic Germans living in the Czech lands before 1945
- Surface statesSurface states are electronic states found at the surface of materials. They are formed du
- Surjection of Fréchet spacesThe theorem on the surjection of Fréchet spaces is an important theorem, due to Stefan Ban
- Svante ArrheniusSwedish scientist (1859–1927)
- Sylvestre François LacroixSylvestre François Lacroix (28 April 1765 – 24 May 1843) was a French mathematician.