In the 1950s, NASA relied on human computers. These skilled women did calculations by hand. While astronauts and their accomplishments were well known, human computers often worked behind the scenes. Hidden Heroes: The Human Computers of NASA explores the legacy of NASA's human computers.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.