Which company developed the first commercially successful electronic point-of-sale system with real-time inventory tracking in the 1970s, revolutionizing retail operations?

The invention of Point-of-Sale (POS) systems revolutionized retail by replacing manual cash registers with computerized systems that could track inventory, process transactions, and collect customer data. These technological innovations dramatically transformed how retailers operate and interact with customers. Test your knowledge about the early development of these game-changing retail technologies that paved the way for today's sophisticated retail analytics and operations.

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IBM (with their IBM 3650 Retail Store System)
NCR (with their NCR 280 system)
Casio (with their Electronic Cash Register)
Digital Equipment Corporation (with their PDP-8 retail adaptation)