Prof. Young has spent the last decade developing ViSta, a Visual Statistics system. This system uses highly dynamic and very interactive visual methods to structure your data analysis experience;to reveal information in your data; to model what you think you see in your data; and to guide you through entire sessions of complex data analyses. ViSta can also perform ``canned'' script-based analyses, ``automagically'' visualizing data you have in Microsoft's Excel or Access.
ViSta is based on a theory of human-computer interaction derived from work in computational cognitive science and in artificial intelligence; on the data analysis philosophy championed by John Tukey; and on Luke Tierney's XLisp-Stat system for computational and graphical statistics.
ViSta is a free and open software system to which numerous people around the world have contributed. It is available for Windows, Macs and Unix, in English, French and Spanish.