--x decreases the value of x by 1, returning the new value of x.
++x increases the value of x by 1, returning the new value of x.
SmithWatermanSimilarity[u, v] gives a number representing the Smith\[Dash]Waterman similarity between strings or vectors u and v.
Spacer
(Built-in Mathematica Symbol) Spacer[w] displays as a spacer w printer's points wide.Spacer[{w, h}] displays as a spacer w points wide and a total of h points high.Spacer[{w, h, dh}] makes the spacer ...
SpanFromAbove is a symbol that can appear at a particular position in a Grid or related construct to indicate that the corresponding position is occupied by a spanning ...
SqrtBox
(Built-in Mathematica Symbol) SqrtBox[x] is a low-level box construct that represents the displayed object Sqrt[x] in notebook expressions.
StabilityMargins is an option to frequency response plots such as BodePlot, NyquistPlot, and NicholsPlot that specifies the gain and phase margins to be shown on the plot.
Subscript[x, y] is an object that formats as x_y. Subscript[x, y_1, y_2, ...] formats as x Subscript[y, 1], Subscript[y, 2], ....
SystemInformation[] gives detailed information about the Mathematica system being run. SystemInformation["comp"] gives a list of rules with information about the component " ...
Thick
(Built-in Mathematica Symbol) Thick is a graphics directive that specifies that lines which follow should be drawn thick.