Unicode: F74E. Alias: Esc ii Esc. Letter-like form with built-in value.  is interpreted by default as the symbol I, representing Sqrt[-1].

Unicode: F74F. Alias: Esc jj Esc. Letter-like form with built-in value.  is interpreted by default as the symbol I, representing Sqrt[-1]. Used in electrical engineering.

Unicode: F523. Alias: Esc => Esc. Infix operator with built-in evaluation rules. x  y is by default interpreted as Implies[x,y]. x  y  z groups as x  (y  z). Not the ...

Unicode: 221E. Alias: Esc inf Esc. Letter-like form with built-in value. ∞ is interpreted by default as the symbol Infinity.

Unicode: 22C2. Alias: Esc inter Esc. Infix operator with built-in evaluation rules. x ⋂ y is by default interpreted as Intersection[x,y]. The character ⋂ is sometimes called ...

Unicode: F76D. Alias: Esc @ Esc. Structural element with built-in meaning. \[InvisibleApplication] is by default not visible on display, but is interpreted as function ...

Unicode: F765. Alias: Esc , Esc. Structural element with built-in meaning. \[InvisibleComma] is by default not visible on display, but is interpreted on input as an ordinary ...

Unicode: F360. Alias: Esc is Esc. Spacing character. \[InvisibleSpace] is by default not visible on display, but is interpreted on input as an ordinary space. ...

Unicode: 00AB. Alias: Esc g<< Esc. Letter-like form. Used as opening quotation marks in languages such as Spanish. Not the same as \[LessLess]. Not the same as ...

Unicode: 2194. Alias: Esc <-> Esc. Infix arrow operator. x ↔ y is by default interpreted as LeftRightArrow[x,y]. Used in mathematics for various notions of equivalence and ...