GraphStyle is an option to Graph and related objects that specifies styles to use for the different graph elements.
Gray
(Built-in Mathematica Symbol) Gray represents the color gray in graphics or style specifications.
Green
(Built-in Mathematica Symbol) Green represents the color green in graphics or style specifications.
GridBox
(Built-in Mathematica Symbol) 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.
HurwitzZeta[s, a] gives the Hurwitz zeta function \[Zeta](s, a).
ImageResize[image, w] gives a resized version of image that is w pixels wide.ImageResize[image, {s}] gives a resized version of image with a maximum pixel width or height ...
ImportAutoReplacements is an option for cells that specifies which replacement rules Mathematica automatically applies when importing text.
InputPacket[] is a MathLink packet that indicates a prompt for input as generated by Input.
IntervalUnion[interval_1, interval_2, ...] gives the interval representing the set of all points in any of the interval_i.
ItemSize is an option for Grid, Column, and related constructs that specifies the sizes to allow for items.