S is the nineteenth letter in the Latin alphabet. Its name in English is ess , or es- in compounds such as es-hook.
In most writing systems that use the Latin alphabet, as well as the International Phonetic Alphabet, the letter * corresponds to a voiceless alveolar sibilant. One notable exception is Hungarian, where it sounds like the English "sh".
More on [ S ]

Erdõs Pál (1913-1996) - Tribute includes a collection of photos.
MacTutor History of Mathematics: Erdos - Biography with links.
Meta Description: [ Paul Erdös (1913-1996) ]
Paul Erdos - Founded the field of discrete mathematics, which is used in computer science. Gives family background about his coddled childhood, university training in Budapest, and his discovery a proof to Chebyshev's theorem.
Paul Erdos, a Math Wayfarer at Field's Pinnacle, Dies at 83 - New York Times obituary.
Reminiscences of Paul Erdos - Article from The Mathematical Association of America by Melvin Henriksen.
The Erdös Number Project - List of people with Erdös number at most 2.
University of Chicago: Paul Erdös - Tributes, obituaries, and articles.
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