The tutorial describes the use of computer modeling methods for the study of physical systems. Each chapter discusses an independent physical problem, contains an introduction to the essence of the problem, sets out recipes and algorithms for solving it, describes the work program in Fortran 90, and provides examples of its use. The problems considered relate to the fields of statistical physics and condensed matter physics, fractal physics, percolation and chaotic phenomena. For a deeper assimilation of the material, tasks and exercises for independent work are attached to each chapter. For students, graduate students and teachers of physical, physical and chemical specialties, as well as researchers.