[When diners club was being created] McNamara hired a man named Dick Kirkpatrick who, in a matter of weeks, created a simple bookkeeping process for sorting and billing charges and paying the restaurants. Since the computer was still in its infancy, everything was done by hand. In later years, we were to discover that Kirkpatrick’s manual systems were more accurate and certainly more profitable than the early computers installed in the sixties.
when you charge a meal at a restaurant with a Diners’ Club card, your bill is sent to Diners’ headquarters. The restaurant is reimbursed by Diners’. Diners’, mean¬ while, deducts 7 per cent from the price of your meal, a sum the restaurant pays. This sum goes to Diners’ for the han¬ dling, bookkeeping, and collection of the money the card¬ holder pays Diners’ at the end of the thirty-day billing- period.