The Numbers Game: How credit cards were born
Money Matters with Hongbin Jeong and Chua Tian Tian - A podcast by MONEY FM 89.3

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The story of the credit card began in 1950, when business executive Frank McNamara had an unexpected moment of realization after forgetting his wallet during a dinner with clients. This simple mistake led to the creation of the Diners Club card, the first modern credit card, which allowed users to buy now, pay later.See omnystudio.com/listener for privacy information.