This book compiles a selection of peer-reviewed papers from the 4th Eurasian Conference on Frontiers of Computer Science and Information Technology, held in Valencia, Spain, from September 19 to 21, 2025. It provides a comprehensive overview of the latest advancements in key areas such as Computer Graphics and Multimedia, Computer Vision, Image Processing, Pattern Recognition, Information Systems, and Ubiquitous Computing, among others. The collection also offers deep insights into the rapidly evolving world of computer science. By exploring the integration of these diverse fields into intelligent systems, the book highlights their potential applications across various industries. It serves as an invaluable resource for professionals, researchers, and students who wish to explore innovative approaches and emerging trends in the field.