The textbook is intended for studying the course "Informatics" in the 7th grade of a comprehensive school. It is part of the UMK in computer science for grades 5-9, including the author's program, textbooks, workbooks, electronic applications and teaching aids. It can be used after an introductory computer science course in grades 5-6 as part of a continuous study of the subject or serve as an entry point to a separate computer science course in grades 7-9. The principle of invariance to specific computer models and software versions is maintained. The theoretical material is supported by the expanded apparatus for organizing the assimilation of the studied material, which ensures the preparation of schoolchildren for passing the exam for the course of the main school in the GIA format.