Which invention is considered the first true electronic point-of-sale (POS) system, created by IBM in 1973 that revolutionized retail checkout?

The modern shopping experience depends heavily on point-of-sale (POS) systems that have evolved dramatically since their invention. These systems have transformed from simple cash registers to sophisticated transaction platforms that integrate inventory management, customer data, and payment processing. This trivia question explores a pivotal moment in retail technology history that forever changed how businesses process transactions.

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IBM 3660 Supermarket System
NCR 280 Electronic Cash Register
Burroughs UniVac Retail Terminal
Digital Equipment Corporation PDP-8 Store System