Letter to the Editor Available to Purchase

Dear Madam, In his article ‘Automation in indexing’, published in Aslib Proceedings, vol. 13, no. 4 (1961), pp. 107–9, C. W. Cleverdon erred in his description of the indexing technique used in the preparation of Chemical Titles. The keywords are not selected in advance from a prepared list. Instead all words not to be indexed form the list given to the computer.