The book presents a general view of a large number of issues that touch upon the problems of behavior, perception and thinking modeling. Along with general questions, it considers the models of goal directed behavior, perception «with understanding» and active neural brain mechanisms. These models are based on the «Stable disequilibrium principle», maxT principle and systems principles of integrity, purposefulness and activity. It also describes the application of the principles of integrity, purposefulness and activity in the practical systems of written text recognition, such as Grafit, FineReader and FormReader.