Which inventor created the first working self-checkout system, patented as the 'Automated Checkout Machine' in 1992?

Self-checkout technology transformed retail experiences worldwide, but its invention has an interesting history. This trivia question tests your knowledge of retail technology evolution and how this now-common system came to revolutionize the shopping experience. Understanding the origins of retail innovations helps us appreciate the journey of convenience we often take for granted today.

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

Dr. Howard Graham, who developed it at NCR Corporation as a solution to long checkout lines
David R. Humble, who conceived the idea while waiting in a long grocery store line
Margaret Wilson, who pioneered the technology while working for IBM's retail solutions team
Takeshi Yamada, who created it for Japan's 7-Eleven stores to address labor shortages