The society of the twentieth century has often, and with good reason, been called the “information society.” Information is disseminated in unprecedented quantities and at an unprecedented rate. There is in fact so much information, that it is only with great difficulty that what is sought for is arrived at. Often, it is necessary to wade through a maze of materials, connecting to sites of varying description and content, spending time and money, in what all too often is a fruitless search for materials that should be readily accessible.