VertexNormals is an option for graphics primitives which specifies the normal directions to assign to 3D vertices.
WhitespaceCharacter represents a single whitespace character in StringExpression.
WindowFloating is a notebook option that specifies whether the window for the notebook should float on top of other windows when it is displayed on the screen.
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.
Word
(Built-in Mathematica Symbol) Word represents a word in Read, Find, and related functions.
WriteString[channel, expr_1, expr_2, ...] converts the expr_i to strings, and then writes them in sequence to the specified output channel.
$Context is a global variable that gives the current context.
$InitialDirectory gives the initial directory when the current Mathematica session was started.
$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.
$MachineName is a string that gives the assigned name of the computer on which Mathematica is being run, if such a name is defined.