this book constitutes the proceedings of the 10th international conference on parallel computing technologies, pact 2009, held in novosibirsk, russia on august 31-september 4, 2009. the 34 full papers presented together with 2 invited papers and 7 poster papers were carefully reviewed and selected from 72 submissions. the papers are organized in topical sections on models of parallel computing, methods and algorithms, fine-grained parallelism, parallel programming tools and support, and applications.