Deletable is an option for Cell that specifies whether the cell can be deleted interactively using the front end.
DeleteDirectory["dir"] deletes the specified directory.
DelimiterMatching is an option for selections that specifies whether an opening delimiter will match only its respective closing delimiter or any closing delimiter.
DigitCharacter represents a digit character 0\[Dash]9 in StringExpression.
DisplayAllSteps is an option to Animate and related functions that specifies whether all frames should be displayed in an animation, even if to do so would slow the animation ...
DisplayEndPacket[] is a MathLink packet that indicates the end of a series of expressions relating to a postscript graphic.
DisplayPacket[] is a MathLink packet that indicates the beginning of a series of expressions related to a PostScript graphic.
End
(Built-in Mathematica Symbol) End[] returns the present context, and reverts to the previous one.
ExponentStep is an option for NumberForm and related functions that determines in what steps exponents are taken to increase when scientific notation is used.
FileNameDialogSettings -> {opt -> val} is a global option that specifies settings for the Insert File Path dialog box.