Which company invented the first commercially successful mechanical cash register in 1879, marketing it as 'The Incorruptible Cashier'?

Before digital payments and self-checkouts transformed retail, one mechanical innovation revolutionized how stores tracked sales and prevented employee theft. This iconic device became a centerpiece of retail operations for over a century and fundamentally changed retail inventory management. Test your knowledge about this pivotal retail technology that helped build some of America's greatest retail empires.

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National Cash Register Company (NCR)
Western Electric Company
Remington & Sons
American Arithmometer Company (later Burroughs)