Σήμερα 7 Οκτωβρίου η Google αφιερώνει την ημέρα στα γενέθλια της εφεύρεσης του barcode (γραμμωτού κώδικα)
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Barcode Diagram
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Left Hand Guard Bars - These bars serve as a starting reference point for the scanning devices. Number System Character - This digit identifies the type of manufacturer or how the barcode will be used. For example 0, 6, and 7 are generally used in the retail industry, while 3 is assigned to the health and drug manufacturing industries. Number System Bars - These bars correspond to the Number System Character. Manufacturer ID Number - Each company must apply for a Universal Product Identification Number with the Uniform Code Council. The UCC assigns each company a unique six digit identification number for use on all of their products. The number is composed of the Number System Character and a five digit manufacturer's code. Manufacturer ID Bars - These bars correspond to the Manufacturer's ID Number. Tall Center Bar - These bars serve as a middle reference point for the scanning devices. Item Number - Each company is responsible for assigning a unique five digit number to each of their products. Item Bars - These bars correspond to the Item Number. Modulo Check Character - This digit is derived from a mathematical formula based on the unique set of numbers in each barcode that helps ensure the accuracy of the data scan. Modulo Check Bars - These bars correspond to the Modulo Check Character. Right Hand Guard Bars - These bars serve as an ending reference point for the scanning devices. |
More @ :: http://www.barcodeart.com/science/science.html
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