Today's information technology often seems to take on a life of its own, spreading into every part of our lives. In the Roman world things were different. Technologies were limited to small, scattered social groups. By examining five technologies-lists, tables, weights and measures, artistic perspective, and mapping-Mosaics of Knowledge demonstrates how the Romans broke up a world we might have imagined them to unite. That is, the recording, storage, and recall of information in physical media might be expected to bind together persons distant in time and space. More often than not,...