Which retail innovation from the 1950s is considered the forerunner to modern personalization algorithms by enabling the first systematic tracking of individual customer preferences?

Before algorithms and AI dominated retail personalization, earlier innovations laid the groundwork for customer-specific marketing. This trivia explores a pivotal moment in retail personalization history that transformed how businesses understood and targeted individual customers, setting the stage for today's sophisticated systems. Test your knowledge about this revolutionary development that changed the retail landscape forever.

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The Diners Club card, which tracked individual purchase patterns across multiple retailers
Punch card loyalty programs at supermarkets, which recorded specific product purchases by customer
Department store 'personal shopper' services that maintained handwritten customer preference files
The IBM 305 RAMAC computer system used by Sears for inventory management and customer profiling