Bluetooth is a short-range wireless technology that allows you to connect devices such as a Bluetooth mouse or keyboard.
Two categories of wireless technology — short-range and long-range — are used for different purposes.
How to switch language keyboards on your Mac.
How to type European and other accents such as the grave, acute and umlaut. You probably need ‘dead’ keys to do it.
How to use Modifier keys to speed up your computer use.