Innovative hardware also makes computing more accessible. Specially designed keyboards organize functions for persons with particular cognitive challenges and also meet other needs, such as allowing those who cannot push two keys at once to achieve the same effects by pushing the keys in succession. They can also make it possible for someone who can't roll the mouse to move the cursor by pressing buttons. Special switches can substitute for mouse keys, permitting people to use other hand motions in place of the single finger pushes required by an ordinary mouse. Special handles that fit into the user's mouth operate joysticks that substitute for a regular mouse and produce all the same on-screen effects.
Devices enabling users to control the cursor through puffs of breath produce similar results.
And specialized data output options include devices that magnify the monitor's image and transform it into speech or Braille. Many of these programs also allow persons with communicative disabilities to use the computer as a speaking machine, which translates typed material into spoken language. Inability to use other equipment far less complex than a computer can also severely limit occupational and recreational options. Simple hand tools such as screwdrivers, wrenches and graters permit people to repair cars or prepare meals. Losing a hand, therefore, can deprive a person of the independence of doing personal chores.