Which pioneering retail analytics technique from the 1930s revolutionized how department stores tracked customer purchasing patterns?

Before modern data systems, retailers still found ways to understand their customers. This poll explores how customer analytics evolved throughout retail history, showing how merchants gathered and used consumer insights long before the digital age. Test your knowledge about the historical foundations of today's sophisticated retail analytics systems!

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The Lazarus Charge Plate system, which used metal identification cards to record purchases and build customer profiles
Montgomery Ward's Household Census program, which sent surveyors door-to-door to catalog family purchasing habits
Macy's Radio Frequency Identification tags, which were attached to luxury items to track inventory movement
Sears Roebuck's Customer Satisfaction Telegraph system, which collected real-time feedback from regional stores