BracketingBar[x, y, ...] displays as |x, y, ...|.
Cap
(Built-in Mathematica Symbol) Cap[x, y, ...] displays as x\[Cap]y\[Cap]....
CenterDot[x, y, ...] displays as x\[CenterDot]y\[CenterDot]....
CircleDot[x, y, ...] displays as x\[CircleDot]y\[CircleDot]....
CircleTimes[x] displays as \[CircleTimes]x.CircleTimes[x, y, ...] displays as x\[CircleTimes]y\[CircleTimes]....
Colon
(Built-in Mathematica Symbol) Colon[x, y, ...] displays as x \[Colon] y \[Colon] ....
Congruent[x, y, ...] displays as x \[Congruent] y \[Congruent] ....
ContinuousTimeModelQ[expr] gives True if expr is a continuous-time StateSpaceModel or TransferFunctionModel object, and False otherwise.
ConwayGroupCo1[] represents the sporadic simple Conway group Co_1.
Coproduct[x, y, ...] displays as x\[Coproduct]y\[Coproduct]....