Preclassification System for the Wyandotte-ASTM Punched Cards, Indexing Spectral Absorption Data

Authors: Leysen, R.; Van Rysselberge, J.

Source: Applied Spectroscopy, Volume 19, Issue 3, Pages 65-102 (May 1965) , pp. 72-74(3)

Publisher: Society for Applied Spectroscopy

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Abstract:

Once that the number of Wyandotte-ASTM punched cards indexing spectral absorption data exceeded several thousand, it was necessary to use a more rapid method in order to obtain a reasonable speed of retrieval. A preclassification of the total deck is described which needs no other special equipment than a card sorting machine. With this method 2,836 cards must be handled in the most unfavorable case instead of the 42,000 representing the authors' collection.

Document Type: Research article

DOI: http://dx.doi.org/10.1366/000370265789619944

Affiliations: 1: Analytical Department, Labofina S.A., Centre de Recherches du Groupe Petrofina, Brussels 12, Belgium

Publication date: 1965-05-01

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