Code crams all the knowledge of how modern computers work from start to finish such that a person with absolutely no knowledge of computers can understand. I was amazed to find out that the technology existed to make a fully functional modern computer, albeit severely limited in memory and speed, back in the early 1800s using relays. Modern computers didn’t develop in a vacuum and suddenly appear in the early 1950s, they have a long and varied history from the development of Braille, telegraph, Morse code, vacuum tubes, Boolean algebra, transistors, von Neumann architecture, and Church/Turing thesis. Even with an undergrad computer science degree I didn’t have the full understanding and deep appreciation of computers as a whole until reading this book. I now feel confident I could go to radio shack and build a computer from scratch and I’m almost tempted to do so after reading Code.