Which retail innovation, introduced in 1937, fundamentally changed shopping by allowing customers to self-select products rather than requesting them from clerks behind counters?

The evolution of retail technology has dramatically changed how we shop throughout history. While modern e-commerce may seem like a recent development, technological innovations in retail have been transforming shopping experiences for centuries. This poll tests your knowledge about a pivotal moment in retail history that forever changed how customers interact with products in stores.

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

Shopping cart (invented by Sylvan Goldman for his Humpty Dumpty supermarket chain)
Barcode scanner (developed by Norman Joseph Woodland)
Point-of-sale cash register (created by John H. Patterson's National Cash Register)
Automated checkout system (pioneered by Clarence Saunders in Piggly Wiggly stores)