CellChangeTimes is an option to Cell that specifies when changes were made to the cell.
ComposeSeries[series_1, series_2, ...] composes several power series.
DialogSymbols is an option for Dialog which gives a list of symbols whose values should be localized in the dialog.
Locked
(Built-in Mathematica Symbol) Locked is an attribute that, once assigned, prevents modification of any attributes of a symbol.
MousePosition[] gives the current mouse position in the notebook front end. MousePosition["coords"] gives the mouse position with respect to the specified coordinate ...
Path
(Built-in Mathematica Symbol) Path is an option for Get and related functions which gives a list of directories to search in attempting to find an external file.
ReturnExpressionPacket[expr] is a MathLink packet that contains the expression expr, the result of an EnterExpressionPacket evaluation.
ScriptLevel is an option for selections that is used in determining the font size of modifiers such as subscripts and superscripts in a nested expression.
Signature[list] gives the signature of the permutation needed to place the elements of list in canonical order.
WindowToolbars is a notebook option that specifies the toolbars to include at the top of the window used to display the notebook on the screen.