SampledSoundList[{a_1, a_2, ...}, r] is a sound primitive that represents a sound whose amplitude has levels a_i sampled r times a second.
Sharpen
(Built-in Mathematica Symbol) Sharpen[image] gives a sharpened version of image.Sharpen[image, r] gives a version of image sharpened over pixel radius r.
ShowAutoStyles is an option for Cell that specifies whether styles that are specified to be automatically used for various syntactic and other constructs should be shown.
ShowCellLabel is an option for Cell that specifies whether to display the label for a cell.
Skeleton[n] represents a sequence of n omitted elements in an expression printed with Short or Shallow. The standard print form for Skeleton is <<n>>.
Skip
(Built-in Mathematica Symbol) Skip[stream, type] skips one object of the specified type in an input stream. Skip[stream, type, n] skips n objects of the specified type.
Spacings is an option to Grid and related constructs that specifies the spacings to leave between successive objects.
StringTrim["string"] trims whitespace from the beginning and end of " string".StringTrim["string", patt] trims substrings matching patt from the beginning and end.
Superscript[x, y] is an object that formats as x^y.
SystemsModelLabels is an option to StateSpaceModel and TransferFunctionModel that specifies labels of the variables.