DatePlus[date, n] gives the date n days after date.DatePlus[date, {n, " unit"}] gives the date n units after date.DatePlus[date, {{n_1, "unit_1"}, {n_2, "unit_2"}, ...}] ...
Default
(Built-in Mathematica Symbol) Default[f] gives the default value for arguments of the function f obtained with a _. pattern object. Default[f, i] gives the default value to use when _. appears as the ...
DeleteContents is an option for DeleteDirectory that specifies whether the contents of directories should automatically be deleted.
Deployed is an option for displayed objects, cells, and notebooks that specifies whether their contents should be considered deployed, so that elements such as Slider, ...
EnterExpressionPacket[expr] is a MathLink packet that requests the evaluation of expr.
EnterTextPacket[string] is a MathLink packet that requests the parsing and evaluation of string as an expression.
EvaluatePacket[expr] is a MathLink packet requesting evaluation of expr.
FactorialPower[x, n] gives the factorial power x (n). FactorialPower[x, n, h] gives the step-h factorial power x (n, h).
First
(Built-in Mathematica Symbol) First[expr] gives the first element in expr.
FormBox
(Built-in Mathematica Symbol) FormBox[boxes, form] is a low-level box construct which displays as boxes but specifies that rules associated with form should be used to interpret boxes on input.