This book constitutes the refereed proceedings of the Third International Symposium on High-Performance Computing, ISHPC 2000, held in Tokyo, Japan in October 2000. The 15 revised full papers presented together with 16 short papers and five invited contributions were carefully reviewed and selected from 53 submissions. Also included are 20 refereed papers from two related workshops. The book offers topical sections on compilers, architectures and evaluation; algorithms, models, and applications; OpenMP: experiences and implementations; and simulation and visualization.