Abstract
Throughout their history, libraries have played many important roles within the context of knowledge archival, information retrieval and knowledge dissemination. Today, libraries fulfil very many technical, social and educational roles. Indeed, for many people ‘the library’ provides the only source of educational resource after conventional formal education has ceased. This paper discusses the basic functions of library systems and the roles that they must undertake within modern societies. The potential of new technologies and media reform within library systems is then discussed and, depending upon the extent of uptake of these new technologies, four future types of library system are identified: polymedia, electronic, digital and virtual. Each of these types of library system is described, their distinguishing features identified and the implications of such systems then discussed.