"The idea behind a chorded keyboard is to press several keys simultaneously to give a specific input into a computer, much like a pianist presses several keys on a piano to play a chord. The traditional keyboard uses this approach for capital, control, and meta characters. The fully chorded keyboard extends this to the entire keyspace".

===== References =====

  * Chorded input related links

http://www.infogrip.com/

http://www.fingerworks.com/

http://www.etla.net/~willey/projects/chordkey/