They’ve been around since 1994, you’ve likely seen them and maybe even used them unknowingly, however QR (Quick Response) codes have been given a new birth thanks to modern smartphones.
What are they?
“A QR Code is a matrix barcode (or two-dimensional code), readable by QR scanners, mobile phones with a camera, and smartphones. The code consists of black modules arranged in a square pattern on white background. The information encoded can be text, URL or other data.”– Wikipedia.