ControlType is an option for Manipulate and related functions that specifies what type of controls should be displayed.
ConwayGroupCo1[] represents the sporadic simple Conway group Co_1.
DefaultElement is an option for Grid and related constructs which specifies what to insert when a new element is interactively created.
DeleteSmallComponents[image] replaces small connected components in a binary image image with background pixels.DeleteSmallComponents[m] replaces positive integers in a label ...
DialogNotebook[{cell_1, cell_2, ...}] represents a dialog notebook that can be manipulated by the Mathematica front end.
DiceDissimilarity[x, y] gives the Dice dissimilarity between Boolean vectors x and y.
DirectedGraphQ[g] yields True if the graph g is a directed graph and False otherwise.
Directory[] gives the current working directory.
EdgeRenderingFunction is an option for GraphPlot and related functions that gives a function to generate the graphics primitives to use in rendering each edge.
Encode
(Built-in Mathematica Symbol) Encode["source", " dest"] writes an encoded version of the file source to the file dest. << dest decodes the file before reading its contents. Encode["source", " dest", " ...