My understanding of the genetic code as a semiotic system began 35 years ago with the publication of the book Genes, molecules, language . 1 But then it could not be said publicly, because the time had not come for a possible new paradigm. 2 However, the very title of the book suggests that it is about semiotics, i.e. about semiology; also in relation to the chemical code, as I looked at PSE already in older works , and in newer ones ; language, as natural human spoken language. [A minimal excerpt from that book (translated from Serbian), is here in Box 1.]