Unlock the secrets of effective Human-Computer Interaction (HCI) with this comprehensive textbook. It meticulously guides you through the entire software development lifecycle for interactive products, detailing core HCI concepts at each stage. Learn to gather requirements, model interactions, design intuitive user interfaces, implement your vision, and rigorously evaluate outcomes. Essential for Computer Science, IT, and Design students and professionals across India, this book provides foundational knowledge and practical tools, including lecture slides and source code, needed to create exceptional user-centric applications. Elevate your expertise in interaction design.