Radia Perlman

Who She Was 

Radia Perlman is a software designer and network engineer whose work fundamentally shaped how the internet functions today. Born in 1951 in Virginia, she studied mathematics at MIT, when very few women were pursuing technical degrees, and went on to earn her PhD in computer science there as well. She spent decades working at technology companies, including Digital Equipment Corporation, Sun Microsystems, and Intel, designing systems that solved some of the hardest problems in network architecture. She holds more than 100 patents and has been inducted into the Internet Hall of Fame. Despite her outsized impact on the field, she remains one of the most underrecognized figures in the history of computing.
 

Why She Matters

Perlman invented the Spanning Tree Protocol, an algorithm that solved a critical problem in network design: how to prevent data from looping endlessly through a network and crashing the entire system. Without it, the large-scale networks that power the modern internet could not function reliably. Her algorithm is still embedded in virtually every network switch in use today, meaning her work is quietly running inside the infrastructure of hospitals, schools, banks, and data centers around the world. She has spent her career pushing back against the idea that any single person deserves to be called the "Mother of the Internet," insisting that great technology is always built collaboratively, which itself says something important about how the best engineers think about their work.