This standard BS ISO 12656:2001 Micrographics. Use of bar codes on aperture cards is classified in these ICS categories:
37.080 Document imaging applications
35.040.50 Automatic identification and data capture techniques
35.220.10 Paper cards and tapes
This International Standard specifies the type, dimensions, and positions of the coding on aperture cards that comply with ISO 3272-3.
This International Standard is applicable to OCR characters, bar codes, Hollerith, and printed Hollerith codes. It is not applicable to compressed bar codes.