Arno Borst, The Ordering of Time: From the Ancient Computus to the Modern Computer . Trans. Andrew Winnard. Chicago: University of Chicago Press, 1993. Pp. x, 168; black-and-white frontispiece, 25 black-and-white plates. $39.95 (cloth); $17.95 (paper). First published in 1990 as Computus: Zeit und Zahl in der Geschichte Europas, by Klaus Wagenbach.