ReadList["file"] reads all the remaining expressions in a file and returns a list of them. ReadList["file", type] reads objects of the specified type from a file, until the ...
RunThrough["command", expr] executes an external command, giving the printed form of expr as input and taking the output, reading it as Mathematica input, and returning the ...
ShowContents is an option for selections that specifies whether an object represented by a StyleBox should be displayed on the screen or replaced by blank space.
SpanSymmetric is an option for selections that specifies whether vertically expandable characters are symmetric about the axis of the selection.
UsingFrontEnd[expr] evaluates expr, making use of a front end if necessary.
WhitespaceCharacter represents a single whitespace character in StringExpression.
$Echo
(Built-in Mathematica Symbol) $Echo gives a list of files and pipes to which all input is echoed.
$GeoLocation is a settable global variable that specifies the default geodetic location to use.
$InitialDirectory gives the initial directory when the current Mathematica session was started.
$NewMessage is a global variable which, if set, is applied to the symbol name and tag of messages that are requested but have not yet been defined.