Which mathematical retail innovation, developed in 1973, revolutionized product identification and is now used over 6 billion times daily worldwide?

The intersection of mathematics and retail has transformed how products are developed, displayed, and sold. From complex algorithms determining store layouts to statistical models predicting consumer behavior, math is the hidden force behind modern retail success. This poll tests your knowledge about a famous retail innovation that fundamentally changed how mathematical principles are applied in everyday commerce.

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Universal Product Code (UPC) barcode system
Electronic shelf labeling (ESL) system
Hexagonal store layout optimization model
Binary inventory tracking protocol (BITP)