Unicode: 00B5. Alias: Esc mi Esc. Letter-like form. Used as a prefix in units to denote 10^-6. Not the same as \[Mu].
Unicode: 266E. Letter-like form. Used to denote musical notes. Sometimes used in mathematical notation, often as an inverse of numbering operations represented by \[Sharp].
Unicode: F383. Alias: Esc -␣␣ ␣ Esc. Negative spacing character. Used to bring characters on either side closer together. Width: -4/18 em. Interpreted by default just like an ...
Unicode: F384. Alias: Esc -␣␣ ␣␣ Esc. Negative spacing character. Used to bring characters on either side closer together. Width: -5/18 em. Interpreted by default just like ...
Unicode: F380. Alias: Esc -␣ Esc. Negative spacing character. Used to bring characters on either side closer together. Width: -1/18 em. Interpreted by default just like an ...
Unicode: 2060. Alias: Esc nb Esc. Letter-like form. Used to indicate that no line break can occur at this position in an expression.
Unicode: 00A0. Alias: Esc nbs Esc. Spacing character. Generates a space with the same width as \[RawSpace], but with no line break allowed to occur on either side of it.
\[Or]
(Mathematica Character Name) Unicode: 2228. Aliases: Esc || Esc, Esc or Esc. Infix operator with built-in evaluation rules. x ∨ y is by default interpreted as Or[x,y], equivalent to x||y. Not the same as ...
Unicode: 2032. Alias: Esc ' Esc. Letter-like form. Used to indicate angles in minutes or distances in feet. Used in an overscript position as an acute accent.
Unicode: 0020. Spacing character. Equivalent to the ordinary ASCII character with code 32.