Description: In article the concept of the integrated system of air defence (IADS), including in the structure base C5INSR&EW elements and realising NCW - the concept of conducting operations of the second generation is formalized. Questions of descriptive definition of the term system IADS are considered and its system properties are analyzed. The analysis of the purpose of system - as main system factor is carried out. With reference to IADS concepts are formalized: multifunctionality, complexity, architecture of system.
Keywords: the integrated system of air defence, multifunctionality, complexity of systems, structure, architecture of system, information resistance