ListPlay[{a_1, a_2, ...}] creates an object that plays as a sound whose amplitude is given by the sequence of levels a_i.

LogSeriesDistribution[\[Theta]] represents a logarithmic series distribution with parameter \[Theta].

MaxStepSize is an option to functions like NDSolve that specifies the maximum size of a single step used in generating a result.

NotebookApply[notebook, data] writes data into a notebook at the current selection, replacing the first selection placeholder in data by the current selection, and then ...

NotebookLocate["tag"] locates all cells with the specified tag in your current input notebook, selecting the cells and scrolling to the position of the first one. ...

NumberFieldSignature[a] gives the signature of the field \[DoubleStruckCapitalQ][a] generated by the algebraic number a.

NumberFormat is an option for NumberForm and related functions that specifies how the mantissa, base, and exponent should be assembled into a final print form.

Orderless is an attribute that can be assigned to a symbol f to indicate that the elements e_i in expressions of the form f[e_1, e_2, ...] should automatically be sorted into ...

PageWidth is an option for output streams and for cells which specifies how wide each line of text should be allowed to be.

PaneSelector[{v_1 -> expr_1, v_2 -> expr_2, ...}, v] represents an object that displays as a pane containing the expr_i for which v_i is equal to v.