The thing on the left, is a QR code. Also known in some circles as 'Robot Barf'. I first came across QR codes (QR stands for Quick Response), about four years ago. I thought they were neat idea, and I ...

Among the many changes brought about by the pandemic is the widespread use of QR codes, graphical representations of digital data that can be printed and later scanned by a smartphone or other device.

QR codes are a type of barcode, or scannable pattern, that contain various forms of data, like website links, account information, phone numbers, or even coupons. QR codes are found everywhere from ...