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Upgrading and Repairing PCs by Scott Mueller

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Chapter 15. Input Devices

Keyboards

One of the most basic system components is the keyboard, which is the primary input device. Keyboards are used for entering commands and data into the system. This section looks at keyboards for PCs, examining the various types of keyboards, how they function, the keyboard-to-system interfaces, and keyboard troubleshooting and repair.

In the years following the introduction of the original IBM PC, IBM created three keyboard designs for PC systems, and since then Microsoft has augmented one of them. Together these designs have become de facto standards in the industry and are shared by virtually all PC manufacturers.

The primary keyboard types are as follows:

• 101-key Enhanced keyboard

• 104-key Windows keyboard ...

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