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Geniuses at War: Bletchley Park, Colossus, and the Dawn of the Digital Age

Dylan Schleicher

June 16, 2021

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If you know and love the story of the Allies cracking the Nazi's Enigma Machine, you're going to want to know the story of what came next—the Tunny, the Colossus, and an intelligence operation that laid the foundation for artificial intelligence.

Geniuses at War: Bletchley Park, Colossus, and the Dawn of the Digital Age by David A. Price, Knopf 

You have likely heard of the Enigma Machine, of Alan Turing and his role in cracking the Nazi codes emanating from the device. It is a story that has been popularized in novels, on television, and on film, and Turing is himself well known outside of that story for his theoretical work (begun even before the war) that laid the foundation for computer science.

You’d think that would be as much as one could possibly contribute in one lifetime, but David A. Price, the author of The Pixar Touch and Love and Hate in Jamestown, is here to let us know otherwise: 

What is little known is the story of what came next—little known because postwar security restrictions kept it hidden for decades, with major parts of it remaining classified until the twenty-first century. The conquest of Enigma was only a warm-up. A different section of Bletchley Park, known as the Newmanry, would become the site of the greatest decryption achievements of the war and the launch of the digital age.  

What came next was the cracking of Tunny, whose “ciphering system was ten trillion trillion trillion trillion trillion trillion trillion trillion trillion times as complex as Enigma’s.” It was at Bletchley Park, where the code of the Enigma Machine was also cracked, that the first digital electronic computers were built to tackle this new device. Programmed via plugboard, they were built on the binary logic that modern computers now employ and put to work intercepting and decrypting messages sent by Tunny amongst the highest levels of the Nazi regime and war machine. It was there that the hypothetical, universal computing machine that Turing had theorized began to become a reality, where the first incarnation of those ideas would be built.  

It was a breakthrough in intelligence gathering that would become the foundation of artificial intelligence as it exists today and evolves into the future. Turing’s primary partners in this enterprise were Max Newman, the son of a German immigrant, Tommy Flowers, the working-class son of a bricklayer who “won a competition to be trained in telephone engineering by the Post Office [and] taught himself digital electronics at a time when it was province of laboratory physicists.” It is their story, along with that of so many others that worked alongside them and built on their work to build the world as we know it today. In its ultimate implications and implementation, it may be—for better or worse—the story of us all.

About The Author

Dylan Schleicher has been a part of Porchlight since 2003. After beginning in shipping and receiving, he moved through customer service (with some accounting on the side) before entering into his current, highly elliptical orbit of duties overseeing the editorial and creative aspects of the company. Outside of work, you’ll find him volunteering or hanging out at his kids’ school, catching the weekly summer concert at the Washington Park Bandshell, or strolling through one of the many other parks or greenspaces around his home in Milwaukee (most likely in his garden). He lives with his wife and two children in the Washington Heights neighborhood on Milwaukee's West Side.

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