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Then if we wanted any bit of information from the files, it would be a matter of punching a few buttons on an IBM card-sorting machine, and the files would be sorted electronically in a few seconds. Approximately a hundred items pertaining to a UFO report would be put on each card.
This problem has been followed up very recently in a valuable investigation at Columbia University, in which various habits of typewriting and of card-sorting were acquired and studied in their mutual interference.
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