Which retail innovation, first widely implemented in the 1930s, fundamentally changed how products were displayed and selected by allowing customers to browse and select items themselves?

The 20th century saw revolutionary changes in how products were sold to consumers. This poll explores a pivotal innovation that transformed retail from traditional counter service to the self-service model we know today. Test your knowledge about this fundamental shift in retail history that changed not only how we shop, but also influenced product packaging, branding, marketing, and consumer behavior for generations to come.

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

The shopping cart (introduced by Sylvan Goldman for Humpty Dumpty supermarkets in 1937)
The self-service grocery store (pioneered by Piggly Wiggly founder Clarence Saunders in 1916)
The department store catalog (popularized by Montgomery Ward in the 1920s)
The checkout counter barcode scanner (developed by IBM and first used in 1974)