Whereas the exploration of perpetual contact and mobile communication in the previous chapters has been contingent primarily on comparison across cultures and nations, across the micro–macro divide, and across time, these appendixes provide a different vantage point from which to understand mobile communication. In a rigorous, searching examination, Emanuel Schegloff discusses the interplay between technology and social science with particular reference to the way the telephone set in motion a substantial interest in what today has become known as conversation analysis. The field arose out of a need to analyze the fossil residues of human communication – namely, naturally occurring telephone conversations – and this has led to insight into both human behavior and the way people use technology in their everyday life. As part of his analysis, a heretofore unpublished essay written more than a quarter-century ago is presented, along with an intertextual interpretation. This analysis illumines what is a constant in human intention despite the proliferation of electronic forms of those contacts through cellular phone and other mobile and increasingly semi-automatic communication technologies.