I've found a great paper about the analysis of whether the Universe is a quantum computer. The paper is written by Seth Lloyd. You could have seen him in various documentaries on science programs.
The paper has two parts. In the first he quickly goes through the history of machine based computation starting with Babbage and ending with Zuse and ENIAC. It's not worth skipping I've found new stuff there, like the "Pythagoras syndrome" and I didn't know that there was two other concurring theories with Turing's 1936 work, named ‘On Computable Numbers with an application to the Entscheidungsproblem’.