System linguistics: language as a system

This article is devoted to the study of system linguistics, as well as the study of language as a system. Such concepts as "system linguistics", "langue-langage-parole", "grammar" are considered and analyzed. The main postulates of system linguistics are revealed, the elements of language are characterized. The division of the language into several systematically organized disciplines, such as phonology, phonetics and grammar, is considered. The main components of the language at different structural levels are characterized.