CountryData["tag", " property"] gives the value of the specified property for the country, country-like entity, or group of countries specified by " tag".CountryData["tag", ...
Degree
(Built-in Mathematica Symbol) Degree gives the number of radians in one degree. It has a numerical value of \[Pi]/180.
Diagonal[m] gives the list of elements on the leading diagonal of the matrix m.Diagonal[m, k] gives the elements on the k\[Null]^th diagonal of m.
DirichletTransform[expr, n, s] gives the Dirichlet transform of expr with respect to n.
DynamicModuleValues is an option for DynamicModule that stores downvalues of local symbols.
EvaluatorNames is a global option that specifies the kernels that are currently configured to perform evaluations.
ExtentElementFunction is an option to DiscretePlot and DiscretePlot3D that gives a function to use to generate the primitives for rendering each extent element.
ExtractArchive[file] expands an archive file, saving its content into the current directory.ExtractArchive[file, dir] saves the content of an archive file into directory ...
FindIndependentVertexSet[g] finds an independent vertex set of the graph g with a maximum number of vertices.
FormBoxOptions -> {opt_1 -> val_1, opt_2 -> val_2} is an option for cells that specifies settings for FormBox objects within the cell.