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Published 3 years ago with 3 Comments

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  • Amabaie
    +3

    I just want to know if we can put them on pet collars, so that strays can be returned home.

  • Kysol
    +1

    See not that many people know about barcode check digits, but it's something that I think is useful for people to know. Same sort of check digit is used for Credit Cards as well. Easy way to validate that the number presented hasn't been corrupted.

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