This volume contains papers on software for high performanceparallel computation. Their purpose is to evaluate thecurrent state of the art in software for parallelcomputation, identify the main factors inhibiting practicalapplications of parallel computers, and suggest possibleremedies. In particular, they focus on parallel software, programming tools, and practical experience of usingparallel computers for solving demanding problems. Criticalissues relative to the practical use of parallel computinginclude: portability, reusability and debugging, parallelization of sequential programs, construction of parallel algorithms, and performance of parallel programs and systems. Several tools are described for the first time in this book, and several papers are by outstanding contributors to the field of high speed programming. Highlights include paper son PVM and HeNCE, FORGE 90and High Performance Fortran, Linda, and object oriented programming methods.