use the user's small, sensitive gestures in order to make selections

interpret input from other users in a multiplayer game

overrides the user's noise-cancelling headphones to send urgent messages

sends resistance to the device in response to the actions of the user

producing information

instructing hardware

entering data

running a query

dots per inch

width relative to its height

depth divided by its length

audio quality

translate the audio from a digital video into on-screen captions

create printable output from voice input

scan printed materials and digitize them for a screen reader or Braille printer

enable them to instruct a program or app using only their feet

turn a feature on or off

process data into information

switch to another user

navigate to another part of the screen