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BS 4636-3:1986 Punched cards. Specification for representation of 7-bit and 8-bit coded character sets on 12-row punched cards
standard by BSI Group, 07/31/1986
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Full Description
Card hole patterns assigned to the bit combinations of 7-bit and 8-bit codes.Cross References:
BS 4636:Part 1
BS 4636:Part 2
BS 4730
BS 6006
ISO 2022