Dedicated to the dialogue with the computer and the rules of interaction with it, introduces the capabilities of modern computers. A reader who wants to use a computer to solve his problems will find the necessary information about how the computer works, how programs are compiled in various programming languages, about artificial intelligence, expert systems and much more. And Commissioner Maigret and his assistant Paul, an ardent fan of computers, will help him with this. For radio amateurs, it can be useful to a wide range of readers.