Which calculator brand first introduced the electronic cash register that used mathematical algorithms to revolutionize retail checkout in the 1970s?

Before smartphones and digital registers, calculating prices and taxes in retail was a manual process. But one revolutionary product changed mathematics in retail forever, making calculations faster and more accurate while transforming how stores operated. This product's introduction represented a pivotal moment where mathematical technology directly impacted consumer experiences and retail efficiency. Test your knowledge about this mathematical retail milestone!

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Casio with their 'Electronic Register' series
NCR with their 'Class 280' electronic cash register
Texas Instruments with their 'Retail Calculator' line
IBM with their 'Store System' calculator registers