Something I was thinking about the other day is how some modern credit cards technically have four different ways to pay. Swiping pressure-sensitive paper over the raised numbers (the original method) is still possible, though I haven't seen a merchant actually do this since maybe the mid-2000's. Then you have magstripe, chip, and RFID all in the same card.
Pretty impressive backwards compatibility, although I think the original copy-to-paper mechanism is finally being phased out, since some new credit cards no longer have raised digits. (My new Visa from Chase has the digits on the back, and they're only slightly embossed and not in the same place. Probably wouldn't work with the old swipers.)
Pretty impressive backwards compatibility, although I think the original copy-to-paper mechanism is finally being phased out, since some new credit cards no longer have raised digits. (My new Visa from Chase has the digits on the back, and they're only slightly embossed and not in the same place. Probably wouldn't work with the old swipers.)
I wonder how long until magstripe is phased out?