Socionics is the intensive development branch, situated on the bound of psychology, sociology and information science with the use of the discoveries in the information structures branch, from the alone man psyche till the collective as a whole. The C.G. Jung typology relations leads to the Jung–Augustinavičiūtė 16 mental types as well as to the description of the mental type inner structure, consisted of the 8 mental functions: thinking (logic), feeling (ethic), sensation and intuition in the extraverted and introverted directions. The socionics possesses the 16 types of transactions, designed for description of the 256 mental types relations, including the most comfortable and the conflictable as well. The socionics provides to predict the relations character and the degree of the business, information and psychological compatibility of the people before their joining in one collective, i. e. to solve the “back task” of sociometry.