Bill Buxton's chording keyboard collection: https://www.microsoft.com/buxtoncollection/type.aspx?t=Chord%20Keyboard https://www.microsoft.com/buxtoncollection/t

Bill Buxton's chording keyboard collection: https://www.microsoft.com/buxtoncollection/type.aspx?t=Chord%20Keyboard https://www.microsoft.com/buxtoncollection/type.aspx?t=Chord...