The book describes the most important MATLAB + Simulink extension packages that solve the problems of identifying and analyzing linear and non-linear systems and devices, as well as their visual and event modeling. The packages described in the book use common user interface elements and are able to exchange functions and models. For the first time, the collected material on these packages opens up extensive opportunities for the analysis, modeling and design of a wide variety of systems and devices in all fields of science, technology, production and education. The book is intended for students of universities and universities (primarily technical), their teachers, engineers and scientists.