\[HappySmiley] (Mathematica Character Name)

Unicode: 263A. Aliases: Esc :) Esc, Esc :-) Esc. Letter-like form.

\[HeartSuit] (Mathematica Character Name)

Unicode: 2661. Letter-like form.

\[HorizontalLine] (Mathematica Character Name)

Unicode: 2500. Alias: Esc hline Esc. Letter-like form. Extensible character. Thickness can be adjusted using the SpanThickness option in StyleBox.

\[HumpDownHump] (Mathematica Character Name)

Unicode: 224E. Infix similarity operator. x ≎ y is by default interpreted as HumpDownHump[x,y]. Used to indicate geometrical equivalence.

\[IAcute] (Mathematica Character Name)

Unicode: 00ED. Alias: Esc i' Esc. Letter. Included in ISO Latin-1.

\[IDoubleDot] (Mathematica Character Name)

Unicode: 00EF. Alias: Esc i" Esc. Letter. Included in ISO Latin-1.

\[IGrave] (Mathematica Character Name)

Unicode: 00EC. Alias: Esc i` Esc. Letter. Included in ISO Latin-1.

\[IHat] (Mathematica Character Name)

Unicode: 00EE. Alias: Esc i^ Esc. Letter. Included in ISO Latin-1.

\[Iota] (Mathematica Character Name)

Unicode: 03B9. Aliases: Esc i Esc, Esc iota Esc. Greek letter. Not commonly used. Used in set theory to indicate an explicitly constructible set.

\[Kappa] (Mathematica Character Name)

Unicode: 03BA. Aliases: Esc k Esc, Esc kappa Esc. Greek letter.