Source : Free On-Line Dictionary of Computing

What You See Is What You Get
     
         (WYSIWYG) /wiz'ee-wig/ Describes a user interface for
        a document preparation system under which changes are
        represented by displaying a more-or-less accurate image of the
        way the document will finally appear, e.g. when printed.  This
        is in contrast to one that uses more-or-less obscure commands
        that do not result in immediate visual feedback.
     
        True WYSIWYG in environments supporting multiple fonts or
        graphics is rarely-attained; there are variants of this term
        to express real-world manifestations including WYSIAWYG (What
        You See Is *Almost* What You Get) and WYSIMOLWYG (What You See
        Is More or Less What You Get).  All these can be mildly
        derogatory, as they are often used to refer to dumbed-down
        {user-friendly} interfaces targeted at non-programmers; a
        hacker has no fear of obscure commands (compare {WYSIAYG}).
        On the other hand, {Emacs} was one of the very first WYSIWYG
        editors, replacing (actually, at first overlaying) the
        extremely obscure, command-based {TECO}.
     
        See also {WIMP}.
     
        (1999-03-03)