I understood most of the first three chapters. It was mostly review for me as I had covered the material in my CS syllabus. There were some new material that Feynman discussed though. “Reversible Logic” was one such topic.
I found his explanation of how computers work brilliant (chapter 1). He explains how computers work using the example of dumb but fast mail clerks. He starts off giving them high level instructions on what to do and eventually drilling down to extremely low level instructions. He covers the idea of sub-procedures and abstractions matter of factly. Actually all three chapters were brilliant. Lucid, laymen level explanation of how things works but with real intellectual substance too.
Chapter 4 is about information theory and coding I believe. Feynman is going to talk about Claude Shannon’s theories. I’ve not explicitly learnt anything about Shannon before so this will be interesting stuff for me.