Purpose of the study: to reveal both the nature of their interrelations and the functional relationships of the reflected phenomena (as fragments of social reality) through analyzing the practice of using a number of scientific terms in psychology. Interrelations between these concepts can be represented with the continuum: Prerequisites < Abilities < Special abilities < Professional abilities < Professionallysignificant qualities < Competences < Competence; as well as with the following sequence: Potential < Intrasubject resources < Extrasubject resources.
The article discusses the problem of «acme» in the context of content and relationships of functional systems, which provide the efficiency of professional activity and social success of man as its subject.
