Which technological innovation is widely credited as the first true electronic point of sale (POS) system, revolutionizing retail transactions in the early 1970s?

Before digital cash registers and touchscreen terminals transformed retail checkout experiences, point of sale systems underwent a fascinating evolution. This trivia challenges you to identify a pivotal moment in retail technology history that fundamentally changed how businesses processed transactions. Test your knowledge about the technological breakthrough that laid the foundation for today's sophisticated POS systems!

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IBM's 3660 Supermarket System (1973), which introduced the first barcode scanners and computerized inventory tracking for grocery stores
NCR's 255 Electronic Cash Register (1968), which replaced mechanical components with solid-state circuits but lacked inventory management
McDonald's MICROS system (1974), which pioneered touchscreen interfaces for fast food order processing
Sears' Retail Information System (1971), which connected cash registers to a central mainframe but required manual price entry