<human>:  When I scan a QR code, why does it sometimes say ‘Barcode’?
<bot>: QR codes are a type of barcode. They are a 2D barcode, which means that they have a lot more information than a 1D barcode. A QR code is a type of 2D barcode that contains a URL. When you scan a QR code, it will usually take you to a website.