Which retail technology innovation from the 1970s fundamentally changed inventory management and is considered the grandfather of modern omnichannel retail systems?

Throughout history, retail technology has transformed how merchants sell and how consumers shop. From ancient marketplaces to modern digital platforms, technological innovations have repeatedly revolutionized commerce. This trivia question focuses on a pivotal moment in retail technology history that changed customer experiences forever and set the foundation for today's omnichannel retail landscape.

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• The Universal Product Code (UPC) barcode system
• Electronic cash registers with digital displays
• The first e-commerce systems using ARPANET
• IBM's first retail-specific mainframe computers

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