Which retail technology invention, first used commercially in 1974 at an Ohio supermarket, significantly improved checkout speed and inventory tracking?

The retail landscape has been transformed by numerous technological innovations throughout history. Some inventions fundamentally altered how customers interact with products and merchants, creating entirely new shopping experiences. This trivia question focuses on one of the most significant retail technology advancements that revolutionized checkout efficiency and inventory management worldwide. Test your knowledge about this game-changing retail invention!

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Universal Product Code (UPC) barcode scanner
Electronic credit card terminal
Self-checkout kiosk
Electronic anti-theft security tag system