If you enjoyed this article, I highly recommend the book &quot;The Supermen: The story of Seymour Cray and the technical wizards behind the supercomputer&quot;. It goes into a lot of detail regarding ERA before Cray, the creation of CDC (which is a fantastic start up story regarding how they got funded) along with a lot of specifics on Seymour and his thinking and development style. Seymour is my all time hero, and learning extensively about him and his architectures was what gave me my love of computer architecture and design, with this book being a fantastic information source.