Though short and sweet, 140-character Twitter posts, or tweets, have become standard parts of world communication, from the Oval Office on down. Inside, read how this amazing company began and how it grew rapidly while creating an all-new way for people, including celebrities, athletes, politicians, and more, to speak to the world. Social media companies have changed the way that people in every generation communicate. This series focuses on the technology that is changing the way we connect, relate, and stay informed. Each title in TECH 2.0: WORLD-CHANGING SOCIAL MEDIA COMPANIES includes color photos throughout, and back matter including an index and further reading lists for books and internet resources. Key Icons appear throughout the books in this series in an effort to encourage library readers to build knowledge, gain awareness, explore possibilities, and expand their viewpoints through our content rich nonfiction books. Key Icons in this series are: Words to Understand shown at the front of each chapter with definitions. These words are set in boldfaced color type in that chapter, so that readers are able to reference back to the definitions, building their vocabulary and enhancing their reading comprehension. Sidebars are highlighted graphics with content-rich material within that allows readers to build knowledge and broaden their perspectives by weaving together additional information to provide realistic and holistic perspectives. Text-Dependent Questions are placed at the end of each chapter. They challenge the reader's comprehension of the material they have just read, while sending the reader back to the text for more careful attention to the evidence presented there. Research Projects are provided at the end of each chapter and give readers suggestions for projects that encourage deeper research and analysis. Educational Videos are offered in chapters through the use of a QR code, that, when scanned, takes the student to an online video showing a moment in history, a speech, or an instructional video. This gives the readers additional content to supplement the text. A Series Glossary of Key Terms is included in the backmatter containing terminology used throughout the series. Words found here broaden the reader's knowledge and understanding of terms used in this field.