This title examines the remarkable lives of Chris DeWolfe and Tom Anderson, Mark Zuckerberg, and Jack Dorsey and their work building the groundbreaking social networking companies MySpace, Facebook, and Twitter. Readers will learn about their backgrounds and education, as well as their early careers. Also covered is a look at how these social networking companies operate and issues they face, such as responding to negative feedback, facing competition, and developing new tools and applications for users. Color photos, detailed maps, and informative sidebars accompany easy-to-read, compelling text. Features include a timeline, facts, additional resources, web sites, a glossary, a bibliography, and an index. Technology Pioneers is a series in Essential Library, an imprint of ABDO Publishing Company.