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Bat keyboard

A one-handed, chorded keyboard from Infogrip, Ventura, CA ( for people with the use of only one hand. Invented in 1986 and placed on the market in 1991, the Bat keys are pressed in combination like piano chords. Speeds up to 60 words per minute are obtained. Some people also use the Bat in applications that require text and graphics manipulation, typing with one hand while moving the mouse with the other. See keyboard.

The Bat Keyboard
People with the use of only one hand can type on Infogrip's Bat keyboard by pressing keys like piano chords. (Image courtesy of Infogrip,


There are numerous entries for the types of keyboards used with computers and mobile devices in this encyclopedia, as follows:

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