SuperStar (Built-in Mathematica Symbol)

SuperStar[expr] displays as expr^*.

UnderBar (Built-in Mathematica Symbol)

UnderBar[expr] displays with a bar under expr.

Underflow (Built-in Mathematica Symbol)

Underflow[] represents a number too small to represent explicitly on your computer system.

Whitespace (Built-in Mathematica Symbol)

Whitespace represents a sequence of whitespace characters in StringExpression.

WindowMargins (Built-in Mathematica Symbol)

WindowMargins is a notebook option that specifies what margins to leave around the window that is used to display the notebook on the screen.

Yellow (Built-in Mathematica Symbol)

Yellow represents the color yellow in graphics or style specifications.

$Aborted (Built-in Mathematica Symbol)

$Aborted is a special symbol that is returned as the result from a calculation that has been aborted.

$Display (Built-in Mathematica Symbol)

$Display gives a list of files and pipes to be used with the default $DisplayFunction.

$Epilog (Built-in Mathematica Symbol)

$Epilog is a symbol whose value, if any, is evaluated when a dialog or a Mathematica session is terminated.

$Line (Built-in Mathematica Symbol)

$Line is a global variable that specifies the number of the current input line.