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Communications of the ACM

Communications of the ACM

Hollerith punched card code

This proposed USA Standard presents the standard Hollerith Card Code representation of the 128 characters of USASCII in twelve-row punched cards. Other standards specify the dimensions and quality of punched paper ca rds, and the dimensions and locations of the holes punched in the cards. This coded representation of the USASCII character set for the twelve-row punched card was developed from research, review of historical work and careful consideration of the use of punched cares in information processing and communication. Resolution of several conflicting requirements is reflected herein.

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