NotVerticalBar[x, y, ...] displays as x \[NotVerticalBar] y \[NotVerticalBar] ....
Number
(Built-in Mathematica Symbol) Number represents an exact integer or an approximate real number in Read.
ONanGroupON[] represents the sporadic simple O'Nan group O' N.
OverscriptBox[x, y] is the low-level box representation for OverscriptBox[x, y] in notebook expressions.
Positive[x] gives True if x is a positive number.
PrecedesEqual[x, y, ...] displays as x \[PrecedesEqual] y \[PrecedesEqual] ....
Precedes[x, y, ...] displays as x \[Precedes] y \[Precedes] ....
PrecedesSlantEqual[x, y, ...] displays as x \[PrecedesSlantEqual] y \[PrecedesSlantEqual] ....
PrecedesTilde[x, y, ...] displays as x \[PrecedesTilde] y \[PrecedesTilde] ....
Proportional[x, y, ...] displays as x \[Proportional] y \[Proportional] ....