Unicode: 2285. Alias: Esc !sup Esc. Infix set relation operator. x ⊅ y is by default interpreted as NotSuperset[x,y].
Unicode: 2244. Alias: Esc !~= Esc. Infix similarity operator. x ≄ y is by default interpreted as NotTildeEqual[x,y].
Unicode: 2247. Alias: Esc !~== Esc. Infix similarity operator. x ≇ y is by default interpreted as NotTildeFullEqual[x,y].
Unicode: 2241. Alias: Esc !~ Esc. Infix similarity operator. x ≁ y is by default interpreted as NotTilde[x,y].
Unicode: 2249. Alias: Esc !~~ Esc. Infix similarity operator. x ≉ y is by default interpreted as NotTildeTilde[x,y].
Unicode: 2224. Alias: Esc !| Esc. Infix operator. x y is by default interpreted as NotVerticalBar[x,y]. Used in mathematics to mean x does not divide y.
Unicode: 00F1. Alias: Esc n~ Esc. Letter. Included in ISO Latin-1.
\[Nu]
(Mathematica Character Name) Unicode: 03BD. Aliases: Esc n Esc, Esc nu Esc. Greek letter.
Unicode: 0151. Alias: Esc o'' Esc. Letter. Included in ISO Latin-2. Used in Hungarian, for example in the name Erd ős.
Unicode: 00F6. Alias: Esc o" Esc. Letter. Included in ISO Latin-1.