For the last ten years or so there has been a flood of papers, books, lectures, symposia, and discussions on indexing, classification, mechanical selection, subject analysis, information retrieval, and so on. An earlier generation used words and subject headings: today we use isolates and analets, facets and phases, descriptors and uniterms. A ‘glossary of current terminology’ in classification now runs to 350 terms, mostly of recent coinage.
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