I wish to have a bank ATM card that can handle simultaneously all my bank accounts maintained with several banks. A single ATM card would be issued by one of my bankers and I would have the facility to register all my other bank accounts maintained with other banks, with that single ATM card. This would reduce the hassle of holding a bunch of ATM cards in your pocket and to memorize too many PINs. The same thing can be done with Credit Cards as well. This will also reduce the hassle...