\[OverBracket] (Mathematica Character Name)

Unicode: 23B4. Alias: Esc o[ Esc. Letter-like form. Extensible character.

\[OverParenthesis] (Mathematica Character Name)

Unicode: FE35. Alias: Esc o( Esc. Letter-like form. Extensible character.

\[Paragraph] (Mathematica Character Name)

Unicode: 00B6. Letter-like form.

\[Piecewise] (Mathematica Character Name)

Unicode: F361. Alias: Esc pw Esc. Prefix operator with built-in evaluation rules. Grid[{{e_1, c_1}, {e_2, c_2}}] is by default interpreted as ...

\[PlusMinus] (Mathematica Character Name)

Unicode: 00B1. Alias: Esc +- Esc. Prefix or infix operator. ± x is by default interpreted as PlusMinus[x]. x ± y is by default interpreted as PlusMinus[x,y].

\[PrecedesEqual] (Mathematica Character Name)

Unicode: 2AAF. Infix ordering operator. x ⪯ y is by default interpreted as PrecedesEqual[x,y].

\[PrecedesSlantEqual] (Mathematica Character Name)

Unicode: 227C. Infix ordering operator. x ≼ y is by default interpreted as PrecedesSlantEqual[x,y].

\[PrecedesTilde] (Mathematica Character Name)

Unicode: 227E. Infix ordering operator. x ≾ y is by default interpreted as PrecedesTilde[x,y].

\[Proportion] (Mathematica Character Name)

Unicode: 2237. Infix relational operator. x ∷ y is by default interpreted as Proportion[x,y]. Used historically to indicate equality; now used to indicate proportion.

\[Psi] (Mathematica Character Name)

Unicode: 03C8. Aliases: Esc ps Esc, Esc psi Esc, Esc y Esc. Greek letter. Used in TraditionalForm for PolyGamma.