The first chapter of my 2016 book Turing Tales is made available here. I explain my methodological stance on the history of computer science, and introduce the topic of "conflations," which I believe is key to understanding the history of science and technology.
The official site of ACM Turing Award winners describes Donald E. Knuth as the rare theoretician who writes many lines of code every day. His main life goal from the 1960s onwards is, in a nutshell, to nail the costs of computation down to the last penny.
Approaching him seemed impossible. I had to wait my turn. Swarmed by admirers, Donald E. Knuth was struggling not to spill his drink at a reception in honor of Alan M. Turing. The rain outside and the fact that it was a summer day (June 22, 2012) meant that we were somewhere in England.