Researchers are working on the development of ultra-thin electronic devices made from conductive plastics that can be integrated into fabrics. This allows electronic devices such as MP3 players to be woven into clothing or speakers to be incorporated into curtains. Additionally, scientists are studying the physics of soft materials that can be deformed like artificial muscles using electricity. Furthermore, in the future, piezoelectricity will be utilized so that generators integrated into clothing can capture the movements of the wearer and convert them into energy, for example, to power a mobile phone. This book provides an overview of organic electronics, soft materials, and piezoelectricity.