``What You See Is What You Get'' (abbreviated WYSIWYG, pronounced ``wizzy-wig'') has become the metaphor for most computer interaction today. It first became popular with screen-oriented text editing programs, became the accepted standard in word processing, and has been extended to graphics as exemplified by paint programs such as MacPaint and CAD programs such as AutoCAD. Today, this interface is being applied to integrating publication-quality text and graphics in products such as Interleaf and PageMaker, and is the universal approach to desktop publishing. Attempts to extend the WYSIWYG concept to encompass the user's entire interaction with a computer date from the Smalltalk system, and today are exemplified by icon based interfaces such as the Macintosh operating system and GEM. The generalisation of WYSIWYG to more abstract applications is sometimes referred to as a ``Direct Manipulation Interface'' (DMI).