Social (interactive) robots are a frontier research area in robotics and human-computer interaction. This book summarizes the research of the ATR Intelligent Robotics Laboratory on the ROBOVIE project, a series of robots designed to interact with the elderly and disabled on a daily basis. This laboratory is one of the world's leaders in Humanoid Interactive Robotics. The text covers interdisciplinary topics related to interactive robots, including human behavior recognition and behavior based control. It also presents the results of long-term usability studies and discusses the implementation of robots that interact with sensors and users over a telecommunications network.