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INTRODUCTION BY SESSION CHAIR 295 Leland Wilkinson, Chair of Session on Mining Commercial Streams of Data Introduction by Session Chair Transcript of Presentation BIOSKETCH: Leland Wilkinson is an adjunct professor of statistics at Northwestern University and senior vice president of SPSS, Inc. His research interests include statistical graphics and statistical computing. Dr. Wilkinson received his AB from Harvard College in 1966, his STB from Harvard University in 1969, and his PhD from Yale University in 1975. In addition to his statistics background, Dr. Wilkinson has also served as a lecturer, visiting scholar, and professor of psychology at Yale University, the Israel Institute of Applied Social Research, and the University of Illinois at Chicago. One of Dr. Wilkinson's many accomplishments is the development of SYSTAT, a statistics and statistical graphics package that he designed in the late 1970s and then incorporated in 1983. An early feature of SYSTAT was MYSTAT, a free statistical package for students. SYSTAT and SPSS became the first statistical software companies to market full-featured Windows versions of their software. In 1995, SYSTAT was sold to SPSS, which was in turn sold to Cranes Software International in 2002.