When was the first commercial barcode scanner used in a retail store, marking the beginning of modern automated checkout systems?

The way we check out items at stores has evolved dramatically over the decades. Behind the familiar beep of barcode scanners lies an invention that revolutionized retail forever. This poll tests your knowledge about a pivotal moment in retail history that transformed how products move from shelf to shopping bag, eliminating manual price entry and dramatically speeding up the checkout process. Do you know when this retail revolution began?

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

1974, at Marsh Supermarket in Troy, Ohio, scanning a pack of Wrigley's chewing gum
1969, at Kroger in Cincinnati, Ohio, scanning a can of Campbell's soup
1981, at Walmart in Rogers, Arkansas, scanning a bottle of Coca-Cola
1978, at Safeway in San Francisco, California, scanning a carton of milk