The explosive interest in neural networks and artificial intelligence has already affected all areas of life, and every software developer needs an understanding of the principles of deep learning to solve applied problems. This practical book is an introductory course for everyone involved in data processing, as well as for software developers. You'll start with the basics of deep learning and move quickly to more complex architectures, building projects from scratch. You will learn to use multilayer, convolutional and recurrent neural networks. Only by understanding the principle of their work (from "mathematics" to concepts) will you make your projects successful.