Second edition, revised and supplemented. The 2nd edition of the book includes new materials: formulas and examples of calculating screens; shielding and filtering using integrated circuits; hardware bonding; layout and installation of power supplies; taking into account the norms of permissible radio interferences when designing an avionics device with spark-arresting circuits and units irreducible for protection against pulse interferences; rational computer installation, which ensures fast operation and absence of false actuations. Designed for a wide range of engineers engaged in the development, design, regulation of avionics for various purposes.