quick response” বা তৎক্ষনাৎ সাড়া দেওয়া– code is basically a barcode on steroids. While the barcode holds information horizontally, the QR code does so both horizontally and vertically.When I buy any products From super mall/shopping mall there are QR bar code attach with all of products,when I buy any products,code scanner machine can find price of that product.