SmithWatermanSimilarity[u, v] gives a number representing the Smith\[Dash]Waterman similarity between strings or vectors u and v.
SplineDegree is an option for spline functions and graphics primitives that specifies the degree of polynomial basis to use.
StandardDeviationFilter[image, r] filters image by replacing every value by the standard deviations of the values in its range r neighborhood. StandardDeviationFilter[data, ...
StartScheduledTask[obj] starts the task represented by obj.
StreamStyle is an option to StreamPlot, StreamDensityPlot, and related functions that determines the style to use for drawing streamlines.
TimesBy
(Built-in Mathematica Symbol) x *= c multiplies x by c and returns the new value of x.
TrackedSymbols is an option to Refresh, Manipulate, and related functions that specifies which symbols should trigger updates when their values are changed.
Undefined is a symbol that represents a quantity with no defined value.
Variables[poly] gives a list of all independent variables in a polynomial.
VertexAdd[g, v] makes a graph by adding the vertex v to the graph g.VertexAdd[g, {v_1, v_2, ...}] adds a collection of vertices to g.