Haptics refers to tactile input and feedback in user interfaces. It has been described as "doing for the sense of touch what computer graphics does for vision". Haptic technology works in both directions. Interfaces may incorporate tactile sensors that measure forces exerted by the user on the interface and they use vibration or other motions to provide feedback.
Common examples of haptic technology are vibrating feedback on mobile phones to simulate pressing buttons where no physical buttons exist and vibrating video game controllers. In the future, haptics will be used to make touch screens more practical by affording them the tacile feedback they intrinsically lack.