A touch screen is both input and output. The touch sensor is input, the display screen is output.
It depends what device you put it on...
it is used to put information into a device
Touch screen is an input device.
Both. You Input data in using your touch, and receive data from the screen e.g. Text Messages :) This makes it both an input and output device.
A touch screen is both an input device (on account of its touch-sensitive sensors) and an output device (because it is also a screen).
Touch Screen
a device that you can touch the screen stupid
The MacBook Pro is not a touch screen device. It uses a touch pad.
touch screen
A touch-screen is an input device - the computer reacts to the choice you make by touching the screen.
You can infact change any LCD screen to a touch screen display. If you wish to use the touch screen as a display and input device you must install other software on your computer to recognise the touch screen input.
If you mean "does a touch screen count as an output device", then the answer is "yes, in part". A touch screen is actually two components -- a touch-sensitive surface of some type over the top of a grid of pixels.The touch-sensitive surface is an input device, but the actual display components are an output device. Therefore, the touch sensitive display as a whole is both an input device and an output device.