\[ODoubleDot] (Mathematica Character Name)

Unicode: 00F6. Alias: Esc o" Esc. Letter. Included in ISO Latin-1.

\[OE] (Mathematica Character Name)

Unicode: 0153 Alias: Esc oe Esc. Letter.

\[OGrave] (Mathematica Character Name)

Unicode: 00F2. Alias: Esc o` Esc. Letter. Included in ISO Latin-1.

\[Omicron] (Mathematica Character Name)

Unicode: 03BF. Aliases: Esc om Esc, Esc omicron Esc. Greek letter. Not the same as English o.

\[OverBrace] (Mathematica Character Name)

Unicode: FE37. Alias: Esc o{ Esc. Letter-like form. Extensible character.

\[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.

\[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].