Brian Rotman is Distinguished Humanities Professor in the Department of Comparative Studies at Ohio State University. He is the author of several books, including Mathematics as Sign: Writing, Imagining, Counting; Ad Infinitum...The Ghost in Turing’s Machine: Taking God out of Mathematics and Putting the Body Back In; and Signifying Nothing: the Semiotics of Zero. Rotman has a doctorate in mathematics. Timothy Lenoir is the Kimberly J. Jenkins Chair of New Technologies and Society at Duke University.