The advent of computation can be compared, in terms of the breadth and depth of its impact on research and scholarship, to the invention of writing and the development of modern mathematics Scientific Computing has already begun to change how science is done, enabling scientific breakthroughs through new kinds of experiments that would have been impossible only a decade ago As computing becomes a pervasive part of the scientific process, there is a great opportunity to make powerful computing techniques, previously reserved for projects with only the largest investments, available to a broad scientific community.