Parallel Computing Technologies : 4th International Conference PaCT 97 Yaroslavl Russia September 8 12 1997 Proceedings This book constitutes the refereed proceedings of the Fourth International Conference on Parallel Computing Technologies PaCT 97 held in Yaroslavl Russia in September 1997. The volume presents a total of 54 contributions: 21 full papers 20 short papers 10 posters and three tutorials. All papers were selected for inclusion in the proceedings from numerous submissions on the basis of three independent reviews. The volume covers all current topics in parallel processing; it is divided into sections on theory software hardware and architecture applications posters and tutorials