Which retail innovation was first introduced at the 1939 World's Fair in New York and fundamentally changed how customers paid for products?

The history of retail payment systems has shaped how we shop and do business. From manual cash registers to sophisticated digital transactions, payment technology has evolved dramatically over the centuries. This poll tests your knowledge about a pivotal moment in retail payment history that changed commerce forever. Do you know when and how one of the most important retail payment innovations was first introduced to the public?

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

The credit card (Diners Club)
The IBM cash register with receipt capability
The self-checkout kiosk
The Charge-Plate system (precursor to modern credit cards)