The book contains a systematic review of the current state and prospects for the development of both individual avionics systems and its architecture as a whole. The main classes of systems are considered: navigation, overview, communication, automatic control, information display, maintenance, etc. Functions, operating principle, internal structure, technical characteristics and features are described. The book will be useful to specialists in the aviation industry and transport involved in the creation, production, maintenance and operation of both the avionics systems themselves and aircraft in general, including their flight operation.