Hello. I'm Ken Pier.  On my right is a high-performance programmer's workstation running Cedar.  Cedar is an integrated programming 
environment developed at the Computer Science Lab of the Xerox Palo Alto Research Center.  Cedar is used for experimental systems 
research in many areas of computer science, including graphics and user interfaces.  We are going to look at Gargoyle, an 
interactive two dimensional illustration system implemented in Cedar.  Gargoyle uses a new technique called snap-dragging for 
easily creating geometrically precise drawings.  Gargoyle also has features which allow the user to control the appearance of an 
illustration.  Although Gargoyle shares some features with both CAD systems and painting systems, it is intended for creation and 
editing of graphic-arts-quality illustrations.