How does a search engine find just the right information? It uses a set of instructions you never see. And that wouldn't be possible without the ideas of Ada Lovelace--the first person to describe an algorithm. With historical images and key events before and after Lovelace's innovation, this book will help kids understand Lovelace's groundbreaking impact on the history of computers. Uncover the details of events that changed your world in this Pebble Explore series.