A New Keyboard with Chorded Ternary Keys
Karl H. E. Kroemer, Fadl A. Fathallah, Lawrence W. Langley · Proceedings of the Human Factors and Ergonomics Society Annual Meeting · 1988
A new keyboard has been used in preliminary tests. Each key has 3 state conditions (“ternary key”) and is moved by horizontal displacement of the fingertip, usually together with another key (in “chords”). Little is known about the usability of such a Ternary Chord Keyboard (TCK) from previous experiments. Pilot tests indicated fast performance with a TCK.