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The idea is to only use one hand (preferably the left one) and type the right-hand letters by holding a key which acts as a modifier key.The layout is mirrored, so the use of the muscle memory of the other hand is possible, which greatly reduces the amount of time needed to learn the layout, if the person previously used both hands to type.
It is said to be quick to learn, because human bodies can easily replicate one motion on one side to the other side, and almost as fast as a normal keyboard. [4] Also a standard keyboard can be used with a special keyboard driver software as half-keyboard for temporary or testing use, as the physical layout does not differ.
Hackaday described the Maltron keyboard as "a mass of injection-moulded plastic with two deep dishes for all the keys." [3] Tom's Hardware said that the keyboards were "one of the real first ergonomic, split keyboard to use keywells. Designed for people suffering from RSI, its makers sought to address the needs of people who were, or at the ...
A left-handed USB FrogPad. FrogPad is a small chorded keyboard about the size of a numeric keypad that can be used with one hand. It was produced by Frogpad Inc. The keyboard is optimized by character frequency. 85% of average keystrokes in English text can be typed without chording, and chords are limited to 2 fingers (opposable thumb and one finger).
A BAT keyboard is a one-handed chording keyboard consisting of a base, on which the hand rests, and seven keys. Through pressing combinations of keys, one can attain the same functions as a regular keyboard. The keyboard can be useful for those with a disability and also as a complement to the mouse, on which the other hand can remain.
The Open Steno Project [6] [7] has written free open-source software, including Plover, and has developed cheap open-source hardware for stenography. Plover software translates keypresses to Stenotype on any modern keyboard, with a preference given to ortholinear keyboards that have NKRO functionality. [8]
The layouts are also used by people with full use of two hands, who prefer having one hand free while they type with the other. The left-handed Dvorak and right-handed Dvorak keyboard layouts are mostly each other's mirror image, with the exception of some punctuation keys, some of the less-used letters, and the 'wide keys' (Enter, Shift, etc.).
Overhead view of DataHand units that provide full computer keyboard and mouse functionality The right-hand of a Professional II keyboard [1]. The DataHand is an unconventional computer keyboard introduced in 1990 by DataHand Systems, Inc., designed to be operated without any wrist motion or finger extension.