The iconic power symbol, explained. The power symbol, which can still be seen on nearly all modern PCs and laptops, originated in the 1950s. At the time, devices were still operated using physical ...

Until today, the iPhone’s calculator mimicked the buttons of its forebears: If you keyed in 48.375, for instance, instead of 43.875, tapping “C” within your app would zero out your entry so ...

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

On the symbols layout, for example, click and hold the 1/2 symbol to see eight additional fractions. Click the button labeled &123 to change from the standard QWERTY layout to one filled with symbols.