v_i_o_l_a"I built a #QRcode with my bare hands to see how it works" https://youtu.be/w5ebcowAJD8
– about the development and functioning of #QRcodes, but also about the history of #barcodes.
– about the development and functioning of #QRcodes, but also about the history of #barcodes.
I built a QR code with my bare hands to see how it works
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