>> The grocery store chain Safeway has cash registers that dispense the
>> correct coins.  Very efficient.  Unfortunately, the dialog that the
>> customer uses for debit or credit card payment is slow and inefficient,
>> and that's what most customers are using to pay with now.

> At my local supermarket, debit/credit cards are handled very quickly--
> the customer swipes, enters the PIN, and the approval comes fast.
> Cash is in the middle, and checks are the slowest, even though the
> register fills out the check.

> Some retailers have 'touch' terminals where one merely touches their
> credit card and the transaction is instantly approved.  Very fast.