Unicode: 227E. Infix ordering operator. x ≾ y is by default interpreted as PrecedesTilde[x,y].

Unicode: 2237. Infix relational operator. x ∷ y is by default interpreted as Proportion[x,y]. Used historically to indicate equality; now used to indicate proportion.

Unicode: 0040. Raw operator. Equivalent to the ordinary ASCII character with code 64.

Unicode: 0060. Raw operator. Equivalent to the ordinary ASCII character with code 96.

Unicode: 005C. Raw operator. Equivalent to the ordinary ASCII character with code 92. Equivalent in strings to ∖∖.

Unicode: 002E. Raw operator. Equivalent to the ordinary ASCII character with code 46. As an overscript, used to indicate time derivative. OverscriptBox[x, .] is interpreted ...

Unicode: 0022. Raw operator. Equivalent to the ordinary ASCII character with code 34. Equivalent to ∖" in strings.

Unicode: 003D. Raw operator. Equivalent to the ordinary ASCII character with code 61.

Unicode: 003E. Raw operator. Equivalent to the ordinary ASCII character with code 62. Not the same as \[RightAngleBracket].

Unicode: 007B. Raw operator. Equivalent to the ordinary ASCII character with code 123. Extensible character.