The PaCT-2003 (Parallel Computing Technologies) conference was a four-day conference held in Nizhni Novgorod on September 15-19, 2003. This was the 7th international conference of the PaCT series, organized in Russia every odd year. The ?rst conference, PaCT-91, was held in Novosibirsk (Academgorodok), September 7-11, 1991. The next PaCT conferences were held in: Obninsk (near Moscow),30August-4September,1993;St.Petersburg, September12-15,1995; Yaroslavl,...