The gadgets, tools, and transportation we use today have a come a long way from when they were first invented. This series tells the stories of today's most essential pieces of technology. Each book begins by describing an early era of a technology's development and ends by explaining how the technology is used in the present day. Additional features include a table of contents, fast facts, sidebars, infographics, prompts for critical thinking, a phonetic glossary, an index, information about the author, and sources for further research.