The problem that I will discuss in this essay is marvellously illustrated in the title given to me by the editors. The word “interface” is itself part of the jargon of technology, the technospeak needed by those who develop, use, and discuss functions, things, and relationships that had not existed previously in the human world. They must make up new words to describe new realities (and, unfortunately, allow new and ugly words to obscure old ones). An “interface” presumably describes the way in which one electronic system contacts another so that the first energizes the second. In the old world of human experience, an “interface” is impossible. The face of one human being is visible to another; two faces, smiling or frowning at each other, communicate. The mind behind one face can interpret the movements of another. Never does one human face interpenetrate or merge with another.