SuperPlus[expr] displays as expr^+.
SuperscriptBoxOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for selections that specifies settings for SuperscriptBox objects.
SupersetEqual[x, y, ...] displays as x \[SupersetEqual] y \[SupersetEqual] ....
Superset[x, y, ...] displays as x \[Superset] y \[Superset] ....
SuperStar[expr] displays as expr^*.
SyntaxInformation[f] gives information used to generate syntax coloring and other advisories when f[...] is entered as input.
SystemHelpPath is a global option that specifies which directories are searched for the help notebooks used within the help system.
TabSpacings is an option for character selections that specifies the number of spaces in ems that the cursor advances when the Tab key is pressed.
TextPacket[string] is a MathLink packet containing string, the text output from Mathematica as produced by functions such as Print.
Therefore[x, y] displays as x \[Therefore] y.