SmallCircle (Built-in Mathematica Symbol)

SmallCircle[x, y, ...] displays as x\[SmallCircle]y\[SmallCircle]....

SquareIntersection (Built-in Mathematica Symbol)

SquareIntersection[x, y, ...] displays as x \[SquareIntersection] y \[SquareIntersection] ....

Square (Built-in Mathematica Symbol)

Square[x] displays as \[Square]x.

SquareSubset (Built-in Mathematica Symbol)

SquareSubset[x, y, ...] displays as x \[SquareSubset] y \[SquareSubset] ....

SquareSuperset (Built-in Mathematica Symbol)

SquareSuperset[x, y, ...] displays as x \[SquareSuperset] y \[SquareSuperset] ....

SquareUnion (Built-in Mathematica Symbol)

SquareUnion[x, y, ...] displays as x \[SquareUnion] y \[SquareUnion] ....

Star (Built-in Mathematica Symbol)

Star[x, y, ...] displays as x\[Star]y\[Star]....

StartOfString (Built-in Mathematica Symbol)

StartOfString represents the start of a string for purposes of matching in StringExpression.

StringForm (Built-in Mathematica Symbol)

StringForm["controlstring", expr_1, ...] prints as the text of the controlstring, with the printed forms of the expr_i embedded.

SubStar (Built-in Mathematica Symbol)

SubStar[expr] displays as expr_*.