fifth edition of the Philosophical Dictionary leaves a very favorable impression. It is a useful mass edition. It has been considerably enlarged—by almost one hundred fifty pages compared with the fourth edition. dictionary now contains many new articles: Acceleration of socioeconomic development, The human factor, The meaning of life, Discipline, Social conflict, Understanding, Computerization, Informatics, Philosophy of science, The logic of scientific cognition, Sociobiology, Egoconception, Scientific materialism, Humanity, Ethology, etc. Many of these terms were previously not found at all in our philosophical reference literature, including the Philosophical Encyclopedia [Filosofskaia entsiklopediia] and the Philosophical Encyclopedic Dictionary [Filosofskii entsiklopedicheskii slovar'].