Dr. Atsushi Hori is a Senior scientist of System Software Research Team of RIKEN Advanced Institute for Computational Science in Kobe, JAPAN. His current research interests include parallel operating system. He received B.S. and M.S. degrees in Electrical Engineering from Waseda University, and received Ph.D. from the University of Tokyo. He worked as a researcher at Mitsubishi Research Institute from 1981 to 1992. He was a Senior Researcher of Parallel and Distributed System Software Laboratory at Real World Computing Partnership from 1992 to 2001. After then, he worked at Swimmy Software, Inc. in Japan and Streamline Computing in England for several years.