Please let me know one thing what I still confuse.
Most of the e-commerce web sites provide buying and selling products by just typing credit card or bank account information.
So, I wonder that If this upper procedure is correct,
why we need POS Terminal Devices to make payment.
Some say that there is some security issue to look up.
If so let me know these security issue more detail. And Why we need POS Terminal Devices.
Then, Is POS terminal device talk only to specific bank or multiple banks?