InitializationCellEvaluation is an option for notebooks that specifies whether initialization cells in a notebook are automatically evaluated when the notebook is opened.

Install["name"] starts a MathLink-compatible external program and installs Mathematica definitions to call functions in it.

ItemAspectRatio is an option for GraphicsGrid which specifies the ratio of height to width for the regions in which items are placed in the graphics grid.

Larger is a style or option setting that specifies that objects should be larger.

LinkClose[link] closes an open MathLink connection.

ListDeconvolve[ker, list] gives a deconvolution of list using kernel ker.

Locked is an attribute that, once assigned, prevents modification of any attributes of a symbol.

MatchQ[expr, form] returns True if the pattern form matches expr, and returns False otherwise.

NumberMultiplier is an option for NumberForm and related functions which gives the string to use as a multiplication sign in scientific notation.

NumberString represents the characters of a number in StringExpression.