Computer message systems: / Proceedings of the IFIP TC-6 International Symposium on Computer Message Systems, Ottawa, Canada, 6-8 April, 1981 - Amsterdam: North Holland Publishing Company, 1981 - 465p. ISBN: 0444852536 Subjects--Topical Terms: Information technology Subjects--Index Terms: Computer science Universal Decimal Class. No.: D 681.324(082.2) / M1