QR Code is far more widespread than Data Matrix, Aztec Code or Micro QR Code. Actually Micro QR Code is rarely used and is only given here as a technology preview. If you want to create a campaign for your products using a 2D Code, make sure that you are using QR Codes, not the other types.I have found a free barCode scannerto make my own barcodes for products and it is really convenient and useful.http://www.keepautomation.com/products/word_barcode/barcodes/qrcode.html
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