Which company introduced the first electronic Point of Sale system widely adopted by retailers in the 1970s, fundamentally changing retail operations?

The evolution of retail technology has dramatically transformed how merchants conduct business throughout history. One of the most significant innovations was the introduction of the first modern Point of Sale (POS) systems. These revolutionary devices changed inventory management, customer service, and retail operations forever. Test your knowledge about this pivotal moment in retail history!

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IBM (with their IBM 3650 Retail Store System)
NCR (with their NCR 280 cash register)
Casio (with their Electronic Cash Register)
Digital Equipment Corporation (with their PDP-8 minicomputer)