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"Information technologies" is a textbook in Uzbek for students at technical universities and colleges. It consists of twelve chapters that cover three main fields of information technologies: information systems, computer networks and data structures. The first part presents the concepts of information technologies and information systems, their components, and the role of information systems in organizations and in decision support. The second part is devoted to computer networks and reveals the basics of networking technologies, types of networks, the seven layers of the OSI model, and Internet technologies. The third part introduces programming with data structures: linear, non-linear structures, and algorithms on sorting and searching. This textbook's publication is significant, because there is a dearth of technical information in the native languages of Central Asia, and this book helps remedy that deficit. More information on the textbook is available at the following URL: http://www.undp.uz/publications/publication.php?id=66.