A Simplest Systematics for the Organization of Turn Taking for Conversation**This chapter is a variant version of “A Simplest Systematics for the Organization of Turn-Taking for Conversation,” which was printed in Language, 50, 4 (1974), pp. 696–735. An earlier version of this paper was presented at the conference on “Sociology of Language and Theory of Speech Acts,” held at the Centre for Interdisciplinary Research of the University of Bielefeld, Germany. We thank Dr. Anita Pomerantz and Mr. Richard Faumann for pointing out to us a number of errors in the text.