I think Doug Engelbart deserves credit for introducing the chord keyboard, which he demonstrated in "The Mother of All Demos", not a fictional book written by that homophobic anti-American bigoted foaming at the mouth lunatic Mormon cult member who sits on the board of directors of the National Organization for Marriage. https://en.wikipedia.org/wiki/Chorded_keyboard http://www.youtube.com/watch?v=JfIgzSoTMOs http://americablog.com/2009/04/mormon-leader-of-nom-appears-...

I own an original Enbelbart chord keyboard and mouse set. It was given to me by a friend who worked at SRI, who maintained Doug's PDP-10 that he used to give demos of his work. Some day I hope to hook them up to an Arduino, so I can use them on a more portable computer that a PDP-10!