In which year was the world's first self-checkout system installed in a retail store?

Retail innovation has transformed how we shop over the decades. One of the most significant changes to the in-store experience came with the introduction of self-checkout technology. This innovation reduced wait times, gave customers more control over their shopping experience, and eventually paved the way for even more advanced retail technologies. But do you know when and where this revolutionary retail innovation first appeared? Test your knowledge about this milestone in retail history!

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1992, at a Price Chopper supermarket in New York
1984, at a Safeway store in California
2001, at a Walmart Supercenter in Arkansas
1978, at a Kroger store in Ohio