Which retail innovation, first introduced in 1916 by Clarence Saunders, revolutionized shopping by allowing customers to select their own merchandise without clerk assistance?

Test your knowledge about one of the most significant innovations in retail history that transformed how people shop. This revolutionary concept forever changed the consumer experience by eliminating the need for clerk assistance and introducing self-service shopping. The innovation dramatically reduced operating costs for merchants while expanding product selection for consumers, setting the foundation for modern retail as we know it today.

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The Piggly Wiggly self-service grocery store
The Sears mail-order catalog
The department store escalator
The cash register with receipt printing