Nearly everyone has seen the universal symbol for power — turning on and off — but not everyone knows why that symbol was chosen.

Today’s calculator programs are—or were—simulations of calculators, the electronic machines that had been designed to perform mathematical operations—the old, chunky machine with a printed ...

When you need a multimeter for testing electrical equipment around the home, it's vital to know what all those symbols around ...

The Rechner Calculator is a $0.99 iOS app that replaces several of the normal calculator buttons with simple swipe gestures.

How to use your Calculator for conversions 1. Open your Calculator app. 2. Tap the calculator symbol in the bottom left corner of your screen next to the 0 digit. 3. Tap the switch next to Convert.

The pi symbol in the upper left corner of the calculator should have some twinkling stars around it, and when you click on it, the calculator will show you pi’s first three digits.