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The Classification Literature Automated Search Service, an annualbibliography based on citation of one or more of a set of around 80 book orjournal publications, ran from 1972 to 2012. We analyze here the years 1994 to2011. The Classification Society's Service, as it was termed, has been producedby the Classification Society. In earlier decades it was distributed as adiskette or CD with the Journal of Classification. Among our findings are thefollowing: an enormous increase in scholarly production post approximately2000; a very major increase in quantity, coupled with work in differentdisciplines, from approximately 2004; and a major shift also from clusteranalysis in earlier times having mathematics and psychology as disciplines ofthe journals published in, and affiliations of authors, contrasted with, inmore recent times, a "centre of gravity" in management and engineering.

A History of Cluster Analysis Using the Classification Society's Bibliography Over Four Decades