Mathematica provides access to information on infinite families of groups, as well as sporadic groups of relevance, like the famous 26 sporadic simple groups (27 if the Tits ...

$NumberMarks gives the default value for the option NumberMarks, which specifies whether ` marks should be included in the input form representations of approximate numbers.

Front View sets the view point for the selected (or clicked upon) 3D graphic to the default front orientation.

Top View sets the view point for the selected (or clicked upon) 3D graphic to the default top orientation.

NotebookBrowseDirectory is a global option that determines the current working directory.

SpanLineThickness is an option for selections that specifies the thickness in printer's points of line-spanning characters such as \[Backslash][VerticalLine] and ...

 

ActiveStyle is an option for Hyperlink and related constructs that specifies styles to add when the constructs are active, typically as a result of the mouse being over them.

CellContext is an option for Cell which specifies the context to use for the evaluation of the contents of the cell.

Unicode: 2199. Infix arrow operator. x ↙ y is by default interpreted as LowerLeftArrow[x,y]. Extensible character; grows by default to limited size.