And since there are millions of programmers out there, some of them use it to build amazing things. Mick Ebeling, who founded the 'Not Impossible Foundation', was sad to see that the San Francisco graffiti artist TEMPT got a nerve disease that made him completely paralyzed, unable to do anything than blink with the eyes. It took hours for him to communicate, only by someone going through the alphabet and TEMPT blinking the eyes letter by letter, to build a sentence. The machine which Stephen Hawking uses to communicate is very expensive, and only few people can afford it. Encouraged to help TEMPT, Ebeling invited hackers from all around the world into his home, where they created the Eyewriter, a pair of sunglasses that tracks eye movement and enabled TEMPT to do art again, and to actually communicate with people. The best: the eyewriter is open source, relatively cheap and can be built by anyone with some skills in electrical engineering.
Watch this heart-warming TED talk here:https://www.ted.com/talks/mick_ebeling_the_invention_that_unlocked_a_locked_in_artist