Ventilatory assistance devices may need to be used because of myasthenia gravis
Head trauma devices may need to be used because of myasthenia gravis
Ventilatory assistance devices may need to be used because of polio
Ventilatory assistance devices may need to be used because of ALS
Ventilatory assistance devices may need to be used because of muscular dystrophies
Ventilatory assistance devices may need to be used because of amyotrophic lateral sclerosis
Ventilatory assistance devices may need to be used because of Guillain-Barre syndrome
Ventilatory assistance devices may need to be used because of high spinal cord injuries
Head trauma devices may need to be used because of tetanus
Head trauma devices may need to be used because of botulism
By knowing that they want to do. What you need the computer for will determine what input devices you require.
Yes, however most flights require that you do not use electronic devices for the first and last 10 minutes of the flight as they can interrupt signals. Many flight attendants will announce when it is ok to begin using your devices, if not though, never hesitate to push the button for his or her assistance.
There are multiple devices available to consumers that only require somebody to tap the screen in order to work it. Tablets and the latest smartphones are all devices that just require fingers for us.