InverseZTransform[expr, z, n] gives the inverse Z transform of expr. InverseZTransform[expr, {z_1, z_2, ...}, {n_1, n_2, ...}] gives the multiple inverse Z transform of expr.
PatternSequence[p_1, p_2, ...] is a pattern object which represents a sequence of arguments matching p_1, p_2, ....
Streams
(Built-in Mathematica Symbol) Streams[] gives a list of all streams that are currently open. Streams["name"] lists only streams with the specified name.
Chop
(Built-in Mathematica Symbol) Chop[expr] replaces approximate real numbers in expr that are close to zero by the exact integer 0.
Column
(Built-in Mathematica Symbol) Column[{expr_1, expr_2, ...}] is an object that formats with the expr_i arranged in a column, with expr_1 above expr_2, etc. Column[list, alignment] aligns each element ...
LabelingFunction is an option for charting functions that specifies a function to apply to determine labeling of chart elements.
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.
Defer
(Built-in Mathematica Symbol) Defer[expr] yields an object that displays as the unevaluated form of expr, but that is evaluated if it is explicitly given as Mathematica input.
Sequence[expr_1, expr_2, ...] represents a sequence of arguments to be spliced automatically into any function.
ImageResolution is an option for Export, Rasterize, and related functions that specifies at what resolution bitmap images should be rendered.