The book is addressed to a wide range of readers: those who do not know programming at all, but want to try themselves in the field of IT, and those who are already familiar with software development and would like to try their hand at creating mobile applications. The manual is suitable for both schoolchildren aged 12-16, and students for self-acquaintance with the BAS:Enterprise 8 mobile platform, and teachers for conducting classes.The manual contains step-by-step instructions for preparing and setting up a workplace, as well as three scenarios for creating a mobile application BAS: Crow Counter". The scenarios differ in the level of complexity, and at each next stage of development you will use the previously created application, learning the new mechanisms of the BAS:Enterprise 8 platform and expanding the functionality of your program.To complete the master class, you will need additional tools . The download link is given in the text of the book, and you can also download the video instructions in which the scenarios for master classes of the first and second levels of complexity are reproduced step by step."