The computing literature often draws a sharp distinction between input and output; computer scientists are used to regarding a screen as a passive output device and a mouse as a pure input device.

Wearable computing with input-output devices base on Eye-Based Human Computer Interaction: EBHCI which allows location based web services including navigation, location/attitude/health condition ...

The computing literature often draws a sharp distinction between input and output; computer scientists are used to regarding a screen as a passive output device and a mouse as a pure input device.