Communications in Computer and Information Science

This book constitutes the refereed proceedings of the 31st International Conference on Information and Software Technologies, ICIST 2025, held in Kaunas, Lithuania, during October 16–17, 2025.The 34 full papers included in this volume were carefully reviewed and selected from 89 submissions. They are organized in topical sections as follows:Intelligent Methods for Data Analysis and Computer-Aided Software Engineering; Intelligent Systems and Software Engineering Advances; E-Learning Methods and Technologies; E-Health Information Systems; and Cyber Security.