Which retail technology invention, patented in 1952, was initially met with skepticism by retailers but went on to revolutionize inventory management and checkout processes worldwide?

The retail landscape has been transformed by numerous technological innovations throughout history. Some inventions have completely revolutionized how consumers shop and how retailers operate their businesses. This poll tests your knowledge about a pivotal invention that fundamentally altered retail operations and consumer behavior, setting the stage for modern shopping experiences we know today.

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The barcode scanner (based on Bernard Silver and Norman Woodland's barcode patent)
The electronic cash register (developed by IBM for retail use)
The pneumatic tube payment system (for centralized cash handling)
The automatic door sensor system (for customer traffic flow)