Information management by design: Improving information retrieval on Prestel

This article discusses work undertaken to improve the management of information on Prestel It describes the development of improved indexing and information retrieval systems, leading to the recently introduced new subject index, backed up by a thesaurus and associated software. The work was linked with the development by British Telecom Research and Development Laboratories of the new Keyword system of access, which Prestel plans to introduce shortly.