Chord keyboards.

@article{Noyes1983ChordK,
  title={Chord keyboards.},
  author={Jan Noyes},
  journal={Applied ergonomics},
  year={1983},
  volume={14 1},
  pages={55-9}
}
  • Jan Noyes
  • Published 1983 in Applied ergonomics
Unlike the standard typewriter keyboard, keying on a chord keyboard is carried out by simultaneous patterned pressing of one or more keys. This results in fewer keys being needed on a chord keyboard when compared with a sequential keyboard, where keys are pressed one at a time. For example, five keys allow a total of 31 (2(5) - 1) different chord combinations to be generated. The feasibility of using a chord keyboard as a data entry input device was first seriously investigated in the mid-1950s… CONTINUE READING
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