Staff member Ewen Smart (left) gets his QR code scanned during a demonstration on how to do the self-test kit at a new walk-through Covid test centre at The Engine Shed, Stirling, which opens to the ...

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 ...