S (disambiguation)

S is the nineteenth letter of the English alphabet.

S may also refer to:

General

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"
s, the IPA symbol for a voiceless alveolar sibilant sound
S, the subject of an intransitive verb

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

S, the chemical symbol for the element Sulfur on the periodic table
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 configurations in the R/S system
s, one of the Mandelstam variables, the square of the invariant mass
Siemens (unit), the SI derived unit of electric conductance
S-block of the periodic table, which includes alkali metals, alkaline earth metals, and hydrogen and helium
Spin (physics)

Serine, a standard amino acid abbreviation
ATC code S Sensory organs, a section of the Anatomical Therapeutic Chemical Classification System
S phase or synthesis phase, a period in the cell cycle during interphase

Samsung Galaxy S, the first flagship smartphone of the Samsung Galaxy S series
S (programming language), an environment for statistical computing and graphics
<s>, the opening tag for the HTML element denoting information that is "no longer accurate or no longer relevant", usually rendered as ~~strike-through text~~

S, the pen name of Percy Bysshe Shelley
"S.", the nickname for Solomon Shereshevsky (1886-1958), a Russian journalist, mnemonist, and synesthete notable for his unusual memory abilities