CDFInformation[expr] gives a list of properties relevant to a CDF deployed with the content expr.CDFInformation[notebook] gives usage properties for a CDF to be deployed from ...
Complexes represents the domain of complex numbers, as in x \[Element] Complexes.
Dispatch[{lhs_1 -> rhs_1, lhs_2 -> rhs_2, ...}] generates an optimized dispatch table representation of a list of rules. The object produced by Dispatch can be used to give ...
Enabled
(Built-in Mathematica Symbol) Enabled is an option for objects such as Slider that specifies whether the objects should be enabled for interactive manipulation.
EvenQ
(Built-in Mathematica Symbol) EvenQ[expr] gives True if expr is an even integer, and False otherwise.
FullDefinition[symbol] prints as the definitions given for symbol, and all symbols on which these depend.
InterpretationBox[boxes, expr] is a low-level box construct that displays as boxes but is interpreted on input as expr.
KroneckerSymbol[n, m] gives the Kronecker symbol (n/m).
LiouvilleLambda[n] gives the Liouville function \[Lambda](n).
MachineNumberQ[expr] returns True if expr is a machine-precision real or complex number, and returns False otherwise.