The processing methods and principles for their implementation for each area have their specific features, which are primarily determined by a specific type of storage medium, coding methods and ways to present processing results. Thereby information processing devices for various areas often turn out to be dissimilar to each other. But beyond this outer dissimilarity hides the same methodology and principles of construction processing systems, which is decisive for us and makes up the subject studying in this course. The basis of information processing methods is computational mathematics, information theory and mathematical statistics.