StateSpaceRealization is an option to StateSpaceModel that specifies its canonical representation.
StateSpaceTransform[ss, s_1] transforms the StateSpaceModel object ss using the similarity matrix s_1.StateSpaceTransform[ss, {s_1, s_2}] computes the transformation using ...
StepMonitor is an option for iterative numerical computation functions that gives an expression to evaluate whenever a step is taken by the numerical method used.
StirlingS1[n, m] gives the Stirling number of the first kind S_n^(m).
StreamColorFunction is an option for StreamPlot and related functions that specifies a function to apply to determine colors along streamlines.
StreamColorFunctionScaling is an option for graphics functions that specifies whether arguments supplied to a stream color function should be scaled to lie between 0 and 1.
StreamPoints is an option to StreamPlot, ListStreamPlot, and related functions that determines how many streamlines to draw.
StreamPosition[stream] returns an integer that specifies the position of the current point in an open stream.
StreamScale is an option to StreamPlot, ListStreamPlot, and related functions that determines the length and arrowhead size of streamlines that are drawn.
Streams
(Built-in Mathematica Symbol) Streams[] gives a list of all streams that are currently open. Streams["name"] lists only streams with the specified name.