When the qwerty keyboard and the mouse just won't do, try an extra button on the side.

Whenever a file is opened or saved a number of extra buttons appear in the dialogue box.

And if that isn't enough for you, there's even 2 extra buttons of bonus prayers!

I recognize that this device has better control mechanisms for games, but that's a lot of money just to get some extra physical buttons.

I don't know how a few extra buttons inside a glove you have to wear and plug in would be useful.

By pressing an extra button you hear one language and then another, or, if you want, both simultaneously.

The most common additional feature is wirings for extra buttons.

When you lose your connection it displays an extra button with notification right above the status box.

There will be pocket calculators with an extra button - they already exist, in fact.

This battery grip also has extra buttons for controlling the camera.