NHoldFirst is an attribute which specifies that the first argument to a function should not be affected by N.
NormFunction is an option for functions such as FindFit and NDSolve which gives a function to be minimized in generating results.
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 ...
NotebookConvertSettings -> {opt_1 -> val_1, opt_2 -> val_2, ...} is a global option that specifies settings for converting imported legacy notebooks.
NotebookDirectory[] gives the directory of the current evaluation notebook. NotebookDirectory[nb] gives the directory for the notebook specified by nb.
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 ...
NotebookGet[obj] gets the raw expression corresponding to the notebook represented by the notebook object obj. NotebookGet[] gets the raw expression corresponding to the ...
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. ...
Notebook[{cell_1, cell_2, ...}] is the low-level construct that represents a notebook manipulated by the Mathematica front end.
NotebookOpen["name"] opens an existing notebook with the specified name, returning the corresponding notebook object. NotebookOpen["name", options] opens a notebook using the ...