It's well known that POS also means "piece of shit". I'm not sure how open it is for disruption, nor if it really is enough of a pain point to be worth replaci

It's well known that POS also means "piece of shit". I'm not sure how open it is for disruption, nor if it really is enough of a pain point to be worth replacing. Google has tried with Google Wallet, but who uses that? One thing I have seen is that Girl Scouts are using some attachment on an iPhone to take credit cards at cookie sales. I'm not so sure that this would be useful in a restaurant setting or in a checkout process at a department store. It seems to me that these two use cases cover a large fraction of credit card purchases.