NHoldFirst is an attribute which specifies that the first argument to a function should not be affected by N.
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 ...
NotebookFind[notebook, data] sets the current selection in the specified notebook object to be the next occurrence of data. NotebookFind[notebook, data, Previous] sets the ...
NotebookOpen["name"] opens an existing notebook with the specified name, returning the corresponding notebook object. NotebookOpen["name", options] opens a notebook using the ...
OpenAppend["file"] opens a file to append output to it, and returns an OutputStream object.
OrderedQ[h[e_1, e_2, ...]] gives True if the e_i are in canonical order, and False otherwise.
PlotStyle is an option for plotting and related functions that specifies styles in which objects are to be drawn.
Prolog
(Built-in Mathematica Symbol) Prolog is an option for graphics functions which gives a list of graphics primitives to be rendered before the main part of the graphics is rendered.
Range
(Built-in Mathematica Symbol) Range[i_max] generates the list {1, 2, ..., i_max}. Range[i_min, i_max] generates the list {i_min, ..., i_max}. Range[i_min, i_max, di] uses step di.
Replace
(Built-in Mathematica Symbol) Replace[expr, rules] applies a rule or list of rules in an attempt to transform the entire expression expr. Replace[expr, rules, levelspec] applies rules to parts of expr ...