"Any new technology, just like any new idea, requires some understanding not just of what is new, but also of what it replaces. The current revolution in printing and publishing is no different. It offers new ways of doing things, and new ways of thinking. It offers opportunities for creativity and imagination on a scale and by routes of which we are so far scarcely aware. During the past few years there has emerged a considerable literature about the effect on conventional publishing of what is sometimes called the digital age. "--