FontTracking is an option for Style and Cell that specifies how condensed or expanded you want the font in which text is rendered to be.
Full
(Built-in Mathematica Symbol) Full is a setting used for certain options, typically indicating that a full range of values should be included.
GeneratedCell is an option for Cell that indicates whether the cell was generated from the kernel.
Goto
(Built-in Mathematica Symbol) Goto[tag] scans for Label[tag], and transfers control to that point.
Interrupt[] generates an interrupt.
LetterCharacter represents a letter character in StringExpression.
LineIndentMaxFraction is an option for Cell, StyleBox, and Style that specifies the maximum fraction of the total page width to indent at the beginnings of lines.
MessagePacket[symbol, string] is a MathLink packet containing a Mathematica message identifier of the form symbol::string.
NotebookAutoSave is a notebook option which specifies whether the notebook should automatically be saved after each piece of output generated by evaluation in it.
Order
(Built-in Mathematica Symbol) Order[expr_1, expr_2] gives 1 if expr_1 is before expr_2 in canonical order, and -1 if expr_1 is after expr_2 in canonical order. It gives 0 if expr_1 is identical to expr_2.