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Wednesday, January 7, 2009

keyboard

The keyboard is the main input peripheral used by all computers. The keyboard allows for user input and action with the computer. Much like many type writers, the keyboard has all the letters of the alphabet, numbers 0 - 9 and additional special operational keys.

TYPES OF KEYBOARDS

QWERTY Keyboard - Developed by Sholes in 1868 and is now the official standard of computer keyboards [ISO9995]. The layout of the QWERTY keyboard was designed for two finger typing and was designed to help prevent stuck keys. Now with new technology, stuck keys are no longer an issue; and with the position of the keys, the hands are held close together helping to cause Carpal Tunnel Syndrome. Given all the above problems, this is the most widely used keyboard because the lack of options, can be used without training, is used because of the difficulty of having to teach a different keyboard, and is cheap and easy to find.

Dvorak Keyboard - Developed by Dr. August Dvorak in 1936 as a solution to the outdated QWERTY keyboard. The layout of the keys on this keyboard make it easier and faster to type on when compared with other keyboards.

Chiclet Keyboard - Very small keyboard that was introduced with the PC Jr. with small keys spread out.


KEYBOARD LAYOUTS

Below is a few of the keyboard layouts explained in the above section.




Articles source : http://www.computerhope.com/help/keyboard.htm#05

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