PaCT-99 (Parallel Computing Technologies) was a four-day conference held in St. Petersburg on 6-10 September 1999. This represented the ?fth inter- tional conference in PaCT series, which take place in Russia every odd year. The ?rst, PaCT-91, was held in Novosibirsk (Academgorodok), 7-11 September, 1991. The second PaCT-93 was held in Obninsk (near Moscow), 30 August - 4 September, 1993. The third, PaCT-95, was organized in St.Petersburg, 12- 15...