Pen input

Pen input 

Pen input refers to a computer user-interface using a pen (or stylus), rather than devices such as a keyboard, joysticks or a mouse.

Pen input is also used to refer to the usage of mobile devices such as wireless tablet personal computers, PDAs and GPS receivers. The term has been used to refer to the usage of any product allowing for mobile communication. An indication of such a device is a stylus, generally used to press upon a graphics tablet or touch screen.