it all started in 1949 when Frank MC scheduled a business dinner in a new york restaurant. Before he left for the dinner , Frank changed suits.
When the waiter presented the check, Frank realized that he had left his wallet in the other suit.
but the night Frank asked himself:"why should people be limited to spending what they are carrying in cash, instead of being able to spend what they can afford"
a year later, Frank returned to the same restaurant in new york.
when the check came, Frank handed the waiter a small cardboard card