The Society for Industrial and Applied Mathematics is proud to present the Tenth Conference on Parallel Processing. This series of conferences has played a key role in promoting parallel scientific computing and parallel numerical algorithms. The conference is distinguished by its emphasis on the mathematical and technical aspects of scientific computing on parallel machines. The conference provides a forum for communication among the applied mathematics, scientific computing, and information technology communities. For the tenth conference, we will emphasize three key technologies used today with parallel computing: cluster computing, data mining, and visualization. We will also emphasize three important current applications areas: biology, cosmology, and large-scale simulations. But we will also look to the future in a number of promising emerging technologies. Contributions exploring these, or any aspect of parallel scientific computing are welcome.