What retail innovation, first introduced in the 1930s, revolutionized shopping by allowing customers to select their own products without clerk assistance?

Before online shopping and big box stores, retail underwent massive transformations throughout history. This poll explores a pivotal innovation that fundamentally changed how consumers shopped and revolutionized the retail landscape. Test your knowledge about one of the most significant developments in retail history that shaped the modern shopping experience as we know it today.

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Self-service shopping (the supermarket model)
The introduction of charge cards
Catalog mail-order systems
Barcode scanning technology