Giving an Old Phone a New Purpose I’d like to make use of the phone as more than a desktop conversation piece. To that end, I’ve put an ESP32 system-on-chip (SoC) module into the phone. The ESP32 ...

A calculator has the 7–8–9 buttons at the top whereas a phone uses the 1–2–3 format. Subtle, but puzzling since they serve the same functional goal — input numbers.

A dedicated row of number keys is nice, but in some cases—like, say, when you’re typing phone or credit card numbers into an online form—a full-on numeric keypad is even better.

This EzKEY combo mouse and keypad might be just what you’re looking for if you’re on the road, suddenly need to add a long list of numbers, and your laptop doesn’t have a keypad.

A standard phone keypad consisting of the numbers from 0 to 9 and including the signs "*" and "#". Alphanumeric keypads are an upgrade to those and are used to enter text as well as numbers.

The native Cistercian system is limited to numbers between 1 and 9,999, so we’ll guess that the keypad just outputs the Arabic numeral corresponding to the Cistercian key pressed and doesn’t ...

If you own an iPhone or an iPod Touch there’s an app (for that) that can turn that device into a numeric keypad. It’s called Numberkey and it is by Balmuda. There’s a free version and one ...

You now know how to hide your number on iPhone using the keypad. But there’s more. Why not also learn how to record phone calls on an iPhone? Or learn how to put a call on hold on iPhone.