Idea – Innovating The Simple Calculator, Undo Button

I thought I innovate the simple calculator today. My idea is simple. Why not add an Undo Button on calculators? The button is suppose to work like any other undo function in computer software. When pressed the calculator will reverse back the previous action. So if you accidentally pressed the equal button to early you can reverse that.

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Idea – Innovating The Simple Calculator, Undo Button

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