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Winn L. Rosch Hardware Bible, Sixth Edition by Winn L. Rosch

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Peripheral Control

If your computer didn't have a keyboard, it might be less intimidating, but you probably wouldn't find it very useful. You might make do, drawing pictures with your mouse or trying to teach it to recognize your handwriting, but some devices are so integral to using a computer that you naturally expect them to be a part of it. The list of these mandatory components includes the keyboard (naturally), a mouse, a hard disk, a CD drive, ports, and a display system. Each of these devices requires its own connection system or interface. In early computers, each interface used a separate expansion board that plugged into a slot in the computer. Worse than that, you often had to do the plugging.

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