CharacterEncoding is an option for input and output functions which specifies what raw character encoding should be used.
Constants is an option for Dt which gives a list of objects to be taken as constants.
ContentSize is an option for Manipulate and other functions that specifies the size of the content area to use.
DefaultAxesStyle is a low-level option for graphics functions that specifies the default style to use in displaying axes and axes-like constructs.
DefaultFrameStyle is a low-level option for graphics and related constructs that specifies the default style to use in displaying their frames.
Distributed[x, dist] or x \[Distributed] dist asserts that the random variable x is distributed according to the probability distribution dist.Distributed[{x_1, x_2, ...}, ...
EdgeDelete[g, e] makes a graph by deleting the edge e from the graph g.EdgeDelete[g, {e_1, e_2, ...}] deletes a collection of edges from g.EdgeDelete[g, patt] deletes all ...
Equal
(Built-in Mathematica Symbol) lhs == rhs returns True if lhs and rhs are identical.
FileNameJoin[{"name_1", "name_2", ...}] joins the name_i together into a file name suitable for your current operating system.
FindLibrary[lib] finds a dynamic library that can be loaded by LibraryFunctionLoad.