Which company invented the first commercially successful mechanical cash register in 1879, fundamentally changing retail operations?

The point-of-sale system has evolved dramatically throughout retail history, transforming from simple mechanical devices to sophisticated digital systems. This evolution has fundamentally changed how businesses track sales, manage inventory, and interact with customers. Test your knowledge about one of retail's most transformative technologies that revolutionized the shopping experience worldwide.

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National Cash Register (NCR)
International Business Machines (IBM)
Western Electric Company
Burroughs Adding Machine Company