ScheduledTaskObject[id, expr, spec, ...] is a task object specifying future evaluation of expr according to spec.
ScriptSizeMultipliers is an option for Style that specifies how much smaller to render each successive level of subscripts, etc.
Selectable is an option for displayed objects, cells, and notebooks that specifies whether their contents can be selected interactively using the front end.
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.
SlideView[{expr_1, expr_2, ...}] represents an object in which the expr_i are set up to be displayed on successive slides. SlideView[{expr_1, expr_2, ...}, i] makes the ...
Sqrt
(Built-in Mathematica Symbol) Sqrt[z] or Sqrt[z] gives the square root of z.
SyntaxQ
(Built-in Mathematica Symbol) SyntaxQ["string"] returns True if the string corresponds to syntactically correct input for a single Mathematica expression, and returns False otherwise.
SystemOptions["name"] gives the current setting for the internal system option with the specified name.SystemOptions[] gives the current settings for all settable internal ...
TransferFunctionCancel[tf] cancels common poles and zeros in the TransferFunctionModel object tf.TransferFunctionCancel[tf, crit] cancels only common pole-zero pairs e_i for ...