Clock
(Built-in Mathematica Symbol) Clock[] represents a clock variable whose value cycles continuously from 0 to 1 once per second when it appears inside a dynamically updated object such as a Dynamic. ...
Context
(Built-in Mathematica Symbol) Context[] gives the current context. Context[symbol] gives the context in which a symbol appears.
Contexts[] gives a list of all contexts. Contexts["string"] gives a list of the contexts that match the string.
ContextToFileName["context"] gives the string specifying the file name that is by convention associated with a particular context.
ControllerInformation[] gives dynamically updated information on currently connected controller devices.
CrossingDetect[image] gives a binary image in which white pixels correspond to the zero crossings in image.CrossingDetect[image, delta] treats values in image that are ...
DefaultNotebook is a global option that specifies which notebook is used as a template for all new notebooks.
DerivativeFilter[image, {n_1, n_2}] computes the n_i\[Null]^th derivative of image in the vertical and horizontal directions.DerivativeFilter[image, {n_1, n_2}, \[Sigma]] ...
DialogProlog is an option for Dialog that can give an expression to evaluate before the dialog starts.
DihedralGroup[n] represents the dihedral group of order 2 n.