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GREGORY PFISTER is an IBM Senior Technical Staff Member living in Austin, TX, and an internationally-recognized expert on parallel processing and high availability. His S.B., S.M., and Ph.D. were earned at MIT. He has been an instructor at MIT, an assistant professor at U.C. Berkeley, and a member of the R&D staff of IBM for many years. Two of his many published papers have won "best paper" awards at major conferences.