QR codes are a form of 2-Dimensional barcode – QR is an acronym of Quick Response code, but they may also be referred to as Denso Barcodes. Created by Denso Wave in 1994, QR codes represented a fascinating step forward for the visual representation of binary data. Moving beyond the simple lines-and-spaces approach of previous barcodes, QR codes store information as a matrix, allowing a greater complexity of data and greater efficiency of space. Initially, [...]