There's actually a whole class of keyboards like this [1], the most popular being the Jankó keyboard [2]. Here's [3] a cool demo by a Jankó virtuoso. [1] http:

There's actually a whole class of keyboards like this [1], the most popular being the Jankó keyboard [2]. Here's [3] a cool demo by a Jankó virtuoso. [1] http://en.wikipedia.org/wiki/Jank%C3%B3_keyboard http://en.wikipedia.org/wiki/Jank%C3%B3_keyboard [2] http://en.wikipedia.org/wiki/Isomorphic_keyboard http://en.wikipedia.org/wiki/Isomorphic_keyboard [3] https://www.youtube.com/watch?v=cK4REjqGc9w https://www.youtube.com/watch?v=cK4REjqGc9w