This book presents volume 4 of selected research papers presented at the fifth International Conference on Digital Technologies and Applications (ICDTA’25). Highlighting the latest innovations in digital technologies as: Artificial Intelligence, Internet of things, Embedded systems, generative AI, Network Technology, digital transformation and their applications in several areas as Industry 4.0, sustainability, Energy transition, Economy, Healthcare, etc. The respective papers will encourage and inspire researchers, industry professionals, and policymakers to put these methods into practice.