Recent developments in keysort cards.

Abstract

recording the data. The cards were described, together with the simple punches and sorting needles, or "tumblers," required for their preparation and manipulation. The types of slotting of the cards, single hole or groups of holes ("fields"), were described and illustrated, together with use of a double row of holes to increase coverage of subject matter.

A Study of Methods for Systematically Abbreviating English Words and Names

“…This has been recognized by other winkers, notably Cox, Casey, and Bailey[7], who have designed punched card codes for coding proper names which either ignored the second letter, or provided separate coding spaces for each vowel, and one or two additional code spaces to take care of the remaining 21 characters.…”