Note: Translation from the Russian text of lecture delivered on September 9, 1981 in Bratislava. For English version see Lewis, R., Tagg, E. D. (Eds.): Computers in Education, Proc. 3rd WCCE, Lausanne, July 27—31, 1981, Part 1, North-Holland, Amsterdam, pp. 1-7. Translated J. Kelemen, P. Mikulecký.