WhitespaceCharacter represents a single whitespace character in StringExpression.
WindowMovable is a notebook option that specifies whether to allow the window for the notebook to be moved around interactively on the screen.
WindowOpacity is a notebook option that determines the overall opacity of a displayed window.
WindowStatusArea is a notebook option that specifies what should appear in the status area in the frame of the window used to display the notebook.
$InputFileName is a global variable whose value is the absolute file name of the input file from which input to Mathematica is currently being sought.
$Input
(Built-in Mathematica Symbol) $Input is a global variable whose value is the name of the stream from which input to Mathematica is currently being sought.
$SessionID is a number set up to be unique to a particular Mathematica session.
SQLConnectionPool[...] is an object that represents a connection pool to a data source.
SQLServerInformation[server] returns a list of information about the SQL server.
SQLServerShutdown[server] shuts down an active SQLServer started in Mathematica.