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A brief history of the numeric keypad – OSnews

Summary by osnews.com
The title is a lie. This isn’t brief at all. Picture the keypad of a telephone and calculator side by side. Can you see the subtle difference between the two without resorting to your smartphone? Don’t worry if you can’t recall the design. Most of us are so used to accepting the common interfaces that we tend to overlook the calculator’s inverted key sequence. A calculator has the 7–8–9 buttons at the top whereas a phone uses the 1–2–3 format. …
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osnews.com broke the news in on Monday, May 12, 2025.
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