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Interesting fact: The power on button on Casio's higher end calculators are half pressed by default so you don't accidentally clear the screen by pressing the 'on' button. (I thought it's a
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Emraw 240 Functions Scientific Calculator with Slide-On Case Electronic Large Display Battery Included Big Buttons Handheld Standard Functional Office Scientific Calculator (Pack of 2) - Walmart.com
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Emraw 240 Functions Scientific Calculator with Slide-On Case Electronic Large Display Battery Included Big Buttons Handheld Standard Functional Office Scientific Calculator (Pack of 2) - Walmart.com
![4: Button layout of a calculator application simulating the interface... | Download Scientific Diagram 4: Button layout of a calculator application simulating the interface... | Download Scientific Diagram](https://www.researchgate.net/publication/310796429/figure/fig3/AS:432027133583362@1480014703544/Button-layout-of-a-calculator-application-simulating-the-interface-of-a-conventional.png)
4: Button layout of a calculator application simulating the interface... | Download Scientific Diagram
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