Originally conceived to assist with complex mathematical problems and computations, computers once existed as far simpler versions of their modern counterparts. As the ability to process and store data has become increasingly sophisticated, so too have the devices and resources-from iPads to social networking sites-that allow us to stay plugged in. These exciting volumes examine the technologies that keep us informed, entertained, and connected, wholly revolutionizing life on Earth. Along the way, readers are introduced to the individuals whose work brought forth the systems and networks that we've come to depend on today. * The history and evolution of a wide variety of technologies are examined in depth * Sidebars highlight relevant concepts, individuals, and events * Glossaries explain key technical terms