Last week the retail industry celebrated the 30th anniversary of the first live bar-code scan, which took place in June 1974 at a Marsh store in Troy, Ohio. Despite the much-heralded development of the electronic product code (EPC), the bar code remains entrenched as the main product identification tool in the world. The development of Electronic Data Interchange (EDI), the message format by which trading partners can electronically send documents like purchase orders and invoices to each ...

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