She’s been called “the first lady of software.” A conference named after her attracted over 18,000 attendees last year. She had her own Google doodle. She was even on Letterman.

It’s fair to say that Grace Hopper is one of the most celebrated coders ever. But, behind all the accolades, who was she? And how exactly did she change technology? We talk with Kurt Beyer, author of “Grace Hopper and the Invention of the Information Age.”