Various
This concerns, for example, perpetual motion machines and modern card index systems.
Hans Rudolf Straub
Hans Rudolf Straub is a computer scientist, entrepreneur, author, lecturer and musician. Based on Lake Constance (Switzerland), his interests revolve around the topics of information and language, formal semantics and non-classical logic, as well as structures in music. A selection of his articles and contributions from the individual fields of knowledge, as well as corresponding specialist publications, can be found on this website.