provides a comprehensive overview addressing how recent, digital, technological advances can be applied to olfaction. With an informatics approach into chemistry, the book introduces the extension of chemometrics in a modernized way such as deep learning and AI and applies it to machine olfaction. The book is systematically divided into three main sections: Odor sensing systems: Provides an overview for a variety of devices for odor sensing systems and addresses the concept of active sensing (sensing methodology) and its application to machine olfaction; Cheminformatics: Introduces chemometrics and the concept of odor space. This section also addresses odor reproduction and odor impression predictions; Olfactory displays: Addresses the applications of odor presentation and olfactory display. This section enables its readers to learn a modernized way of scent presentation. is a valuable resource for chemists and biologists who are interested in olfaction and artificial intelligence.