S. Agostino
S is the nineteenth letter of the English alphabet. S may also refer to: History * an Anglo-Saxon charter's number in Peter Sawyer (historian), Peter Sawyer's, catalogue Language and linguistics * Long s (ſ), a form of the lower-case letter s formerly used where "s" occurred in the middle or at the beginning of a word * -s, a suffix added to some English surnames, originally meaning "son of" * , the International Phonetic Alphabet symbol for a voiceless alveolar sibilant sound * S, the Subject (grammar), subject of an intransitive verb Mathematics and logic * Integral symbol (∫), used in mathematics to denote integrals and antiderivatives * S combinator in combinatory logic * Sphere * ''s(n)'', the aliquot sum of an integer n Physics and chemistry * Sulfur, symbol S, a chemical element * S, the symbol for entropy * S, a non-SI unit used to designate molecule size named after the Svedberg sedimentation coefficient * ''S'', a label that denotes one of two chiral center ...
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