Health informatics, encompassing biomedical and health informatics, focuses on the effective utilization of data and information, often facilitated by technology, to enhance individual health, healthcare, public health, and biomedical research. This book aims to offer a thorough initiation into the key domains of this field, catering to beginners and professionals alike. In its 8th edition, the book aligns with the latest insights in the field, furnishing learning objectives, extensive references, and supplementary readings. Whether embarking on studies or already immersed in the domain, readers will find a comprehensive resource reflecting the current knowledge in health informatics.