Unicode: 226B. Infix ordering operator. x ≫ y is by default interpreted as GreaterGreater[x,y]. Not the same as \[RightGuillemet].
Unicode: 2277. Infix ordering operator. x ≷ y is by default interpreted as GreaterLess[x,y].
Unicode: 2A7E. Alias: Esc >/ Esc. Infix operator with built-in evaluation rules. x ⩾ y is by default interpreted as GreaterEqual[x,y].
Unicode: 2273. Alias: Esc >~ Esc. Infix ordering operator. x ≳ y is by default interpreted as GreaterTilde[x,y].
Unicode: 263A. Aliases: Esc :) Esc, Esc :-) Esc. Letter-like form.
Unicode: 2500. Alias: Esc hline Esc. Letter-like form. Extensible character. Thickness can be adjusted using the SpanThickness option in StyleBox.
Unicode: 224E. Infix similarity operator. x ≎ y is by default interpreted as HumpDownHump[x,y]. Used to indicate geometrical equivalence.
Unicode: 00ED. Alias: Esc i' Esc. Letter. Included in ISO Latin-1.
Unicode: 00EF. 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.