Personal data is data about people. Researchers collect personal data to learn more about populations. Companies collect personal data online to help sell their products. This book explores the debate about the collection and use of personal data. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Core Library is an imprint of Abdo Publishing, a division of ABDO.