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Reference

Burnham Coos Stickney

Colemak Keyboard Layout

Ergonomics

The physiological and medical effects of split keyboards and the large forearm support were elaborated in "Studies on Ergonomically Designed Alphanumeric Keyboards" by Prof. Nakaseko and others. The history of the split keyboards and recent researches are summarized in "The Split Keyboard: An Ergonomics Success Story" by Prof. David Rempel.

Japanese keyboard layouts

TRON Keyboard