A selection of papers from INFO II, the Second International Conference on Information Sciences and Systems, University of Patras, Greece, July 9-14, 1979 - Λαινιώτης, Δημήτριος Γ.; Tzannes, N. S. (Nicolaos S.), 1937- (D. Reidel Pub. Co. ; sold and distributed in the U.S.A. and Canada by Kluwer Boston, 1980)