Different Keyboard Types
Standard keyboards are rectangular in shape, and have 84, 101, or 104 keys.
- The original PC keyboard, the XT, has 84 keys. A numeric pad is integrated to the right of the alphabetical keys. Function keys are along the left side of the keyboard.
- The AT keyboard also has 84 keys and is very similar to the original PC keyboard. However, on the AT keyboard, the numeric pad is separate from the alphabetical keys.
- The AT Enhanced keyboard has 101 keys. The function keys are integrated across the top. Arrow keys have been added, as well as a set of six keys— Insert, Delete, Home, End, Page Up, and Page Down. There are also additional command keys such as Esc and Ctrl.
- The Windows 104-key keyboard is similar to the AT Enhanced keyboard, but adds two Windows keys and a Menu key. The Windows keys are analogous to clicking the Windows Start button and the Menu key performs the same functions as right-clicking the mouse.
- Natural or ergonomic keyboards usually split the keyboard in half so each hand can comfortably use its own set of keys. Built-in wrist rests are common, and some ergonomic keyboards also have an integrated pointing device such as a trackball or touch pad.
- Dvorak keyboards rearrange the keys into a more efficient arrangement that makes faster typing possible, for users who have become familiar with it.
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