Mã vạch 1D

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    Còn được gọi là:
    
    linear barcode
    
    1D code
    
  

  

  
  
Traditional linear barcodes (UPC, EAN, Code 128, Code 39) that encode data in bar width variations along one dimension. Limited to ~20-25 characters. QR codes were invented specifically to overcome 1D barcode capacity limitations.


  



  

  
  
  
  

  
  
  
  

    
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      2D Barcode