PrecedenceForm[expr, prec] prints with expr parenthesized as it would be if it contained an operator with precedence prec.
ReadProtected is an attribute that prevents values associated with a symbol from being seen.
SaveDefinitions is an option to Manipulate and related functions that specifies whether current definitions relevant for the evaluation of the expression being manipulated ...
ShowCellLabel is an option for Cell that specifies whether to display the label for a cell.
SubMinus[expr] displays as expr_-.
SubPlus
(Built-in Mathematica Symbol) SubPlus[expr] displays as expr_+.
$ControlActiveSetting is a symbol whose value is True if it is evaluated while a control is active, or in certain other previewing situations.
MathLink connections between Mathematica sessions. This starts up a link on port number 8000. This connects to the link on port 8000.
Equivalences[g, h] lists the vertex equivalence classes between graphs g and h defined by their vertex degrees. Equivalences[g] lists the vertex equivalences for graph g ...