"After the war Zuse constructed the Z4 computer, which became the world’s first commercially used computer. Zuse is also credited with writing the first programming language for his computers: Plankalkül, meaning calculus for programs. As an engineer by trade, Zuse was mainly focused on building a working machine that could perform calculations. He was not at all concerned with the theory of computation, which at that time was explored by renowned mathematicians in the academic world like Schönfinkel, Church, Post, Kleene, and Turing. Because of this, Zuse was not an established name in the academic community as a theoretical computer scientist. It is known however, that Turing and Zuse were familiar with each other’s work (Zenil, 2012). Although Zuse has always been more characterized as an engineer than a theorist. This is perhaps one of the reasons why his main work on computation in physics has been relatively unnoticed in the academic community for so long."