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# ECMA-25

Representation of 8-bit combinations on 12-row punched cards

1st edition, June 1970

The present Standard ECMA-25 specifies the representation of 256, 8 bit combinations on 12 row punched cards. This representation associates bit combinations with hole-patterns; it does not define the content or structure of an 8 bit code.

It does not specify any redundancy nor does it define techniques for error control.