You must have seen the QR code. If you haven't seen it, you must have heard the name. By the way, many of you must be using Paytm, PhonePe, and Google Pay they must know about it. If you do not know, then let us tell you. The full name of qr code is Quick Responsible Code. It is seen as a trademark. There is a lot of information in this small barcode. It can be read through mobile and QR code...