This series demonstrates how certain technologies have evolved, transforming life at home, work and school; each volume focuses on a particular invention or device, enabling readers to learn about the device's development, how it works, and its impact.; Teaching and learning online take place in schools that operate completely in a computerized world. The underlying technology that makes this possible is growing and evolving at a rapid pace, guaranteeing that online schools will be around for a long time; Full-color photographs, intriguing illustrations, visual timelines, and fascinating sidebars and fact boxes complement the text and hold reader interest, while ancillary materials such as bibliographies and a subject index help users target their research