Applied affective computing is the interdisciplinary field focused on developing systems and devices capable of recognizing, interpreting, and responding to human emotions. Integrating computer science, psychology, and cognitive science, this technology aims to enhance human-computer interaction by making it more intuitive and empathetic. Applications span various domains, including healthcare, education, and customer service. In healthcare, affective computing can help monitor and support mental health by analyzing emotional states through voice, facial expressions, and physiological signals. In education, it can tailor learning experiences to student emotions, improving engagement and outcomes. Customer service applications include emotion-aware chatbots and virtual assistants that provide more personalized and effective support. This book outlines the processes and applications of applied affective computing in detail. From theories to research to practical applications, case studies related to all contemporary topics of relevance to this field have been included in this book. Those with an interest in the field of applied affective computing would find this book helpful.