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On-screen keyboard

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When a person is able to operate a mouse or mouse alternative, but is not able to type on a physical keyboard, a virtual, onscreen keyboard may be considered. A picture of a keyboard is displayed on the computer screen, and by pointing to a letter and clicking (or dwelling), the letter is typed. The keyboard that is shown may have a standard QWERTY layout, or it might have a different letter arrangement, show words rather than letters, or be customized for a particular application so that the most frequently used commands are shown. Many on-screen keyboards also use Word prediction to improve speed. Commercial on-screen keyboards usually cost about $400.