DefaultOptions is a style option that allows default options to be specified for particular formatting and related constructs.
Path
(Built-in Mathematica Symbol) Path is an option for Get and related functions which gives a list of directories to search in attempting to find an external file.
$SessionID is a number set up to be unique to a particular Mathematica session.
FrameTicksStyle is an option for 2D graphics functions that specifies how frame ticks should be rendered.
GraphCenter[g] gives the set of vertices with minimum eccentricity in the graph g.
MatrixForm[list] prints with the elements of list arranged in a regular array.
Save
(Built-in Mathematica Symbol) Save["filename", symbol] appends definitions associated with the specified symbol to a file. Save["filename", " form"] appends definitions associated with all symbols whose ...
CharacterRange["c_1", "c_2"] yields a list of the characters in the range from "c_1" to "c_2".
Continue[] exits to the nearest enclosing Do, For, or While in a procedural program.
ReadProtected is an attribute that prevents values associated with a symbol from being seen.