Book excerpt: This book highlights the most important research areas in Information and Communication Technologies as well as research in fields of telecommunication system characteristics at the physical level, deep discussion of telecommunication traffic and its performance indicators, studying of information systems technological parameters, review of public and special applications of information technologies. The book includes strictly selected results of the most interesting scientific research presented at the 10th International Conference “Infocommunications – Present and Future” (IPF’2020) that was held in Odesa, Ukraine. The respective chapters share in-depth and extended results in these areas with a view to resolving practically relevant and challenging issues including: 1. research of telecommunication system characteristics at the physical level: the discussion of various aspects of the signal transmission quality indicators analysis for solving practically important issues in telecommunication systems; 2. research of telecommunication traffic and its performance indicators: the significant aspects of research for forecasting of services characteristics of telecommunication systems; 3.research of information systems technological parameters: the discission of some effective technological solutions that can be used for the implementation of novel systems; 4. research of public and special applications of information technologies: the discussion of the various aspects of scientific and educational applications, etc. These results can be used in the implementation of novel systems and to promote the exchange of information in e-societies. Given its scope, the book offers a valuable resource for scientists, lecturers, specialists working at enterprises, graduate and undergraduate students who engage with problems in Information and Communication Technologies as well as Radio Electronics.