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.
StreamStyle is an option to StreamPlot, StreamDensityPlot, and related functions that determines the style to use for drawing streamlines.
StringFormat["string"] attempts to determine what ImportString format could be used to import the string " string".
String
(Built-in Mathematica Symbol) String is the head of a character string " text".
SynchronousInitialization is an option for Manipulate, DynamicModule, and related functions that specifies whether or not to evaluate the expression given as the setting for ...
SystemOpen["target"] opens the specified file, URL, or other target with the associated program on your computer system.
SystemsModelLabels is an option to StateSpaceModel and TransferFunctionModel that specifies labels of the variables.
TraceForward is an option for Trace and related functions which specifies whether to include later expressions on the evaluation chain that contains the pattern form sought.
Uncompress["string"] recovers an expression from a compressed string representation generated by Compress.Uncompress["string", h] wraps the head h around the expression ...
Underoverscript[x, y, z] is an object that formats as x_y^z.