Bulletin Board System, Yonsei University, 1986. Doctor of Philosophy, Carnegie Mellon University, 1993.
Consultant Klynveld Peat Marwick Goerdeler Korea, Seoul, 1988—1989. Professor Yonsei University, since 1994. Director Human Computer Interaction Laboratory Yonsei University, Seoul, since 2003.
Member Broadcasting Company, Seoul, Korea (South), 2005—2006. Member of Association for computing Machinary Computer Human Interaction (associate).
Married Mikyung Choe, December 21, 1988. Children: Daniel, Taeyoon.