Based on an analysis of the available foreign and domestic open literature, the book attempts to classify information weapons, characterize them and streamline the understanding of their role and place in a modern, contradictory world. A brief history of the emergence and development of information weapons is considered. The essence of reconnaissance carried out by technical means is determined, and definitions of technical means of reconnaissance, as well as objects of reconnaissance are given. The characteristics and capabilities of information-technical and information-psychological weapons are considered. The basics of communicative psychology are given. The possibilities of a person in the perception of information and the influence of information weapons on his consciousness and subconscious are discussed.