LightingAngle is an option for ReliefPlot and related functions that specifies the angle from which simulated illumination is taken to come.

NumberMarks is an option for InputForm and related functions that specifies whether ` marks should be included in the printed forms of approximate numbers.

NumberSigns is an option for NumberForm and related functions which gives strings to use as signs for negative and positive numbers.

SystemOptions["name"] gives the current setting for the internal system option with the specified name.SystemOptions[] gives the current settings for all settable internal ...

Trig is an option for various polynomial manipulation functions that specifies whether trigonometric functions should be treated like polynomial elements.

StringReplaceList["string", s -> sp] or StringReplaceList["string", {s_1 -> sp_1, s_2 -> sp_2, ...}] gives a list of the strings obtained by replacing each individual ...

Eigenvalues and eigenvectors. The eigenvalues of a matrix m are the values λ_i for which one can find nonzero vectors v_i such that m.v_i λ_iv_i. The eigenvectors are the ...

Functionality in this package has been added to the built-in Mathematica kernel. CumulativeSums is replaced by Accumulate. Frequencies is replaced by Tally. BinCounts and ...

<< name reads in a file, evaluating each expression in it, and returning the last one.

GridBox[{{box_11, box_12, ...}, {box_21, box_22, ...}, ...}] is a low-level box construct that represents a two-dimensional grid of boxes or strings in notebook expressions.