There are also other optional input devices that one might want to consider. One optional input device involves speech input. This type of input is really still in the development stage since no one has come up with a way for computers to recognize continuos speech yet. But there are programs available that allow you to use a limited vocabulary to vocally input words and commands into a computer. Joysticks are another input device and often make playing computer games easier and more fun.
Scanners offer users other input opportunities.
Scanners allow a user to copy documents or pictures into a computer. These input devices are not necessary, but they are options you can consider when buying a computer. This is a picture of the Canon CanoScan 620 P, which is a flatbed scanner. Go to scanner to learn more about it. Output devices should also be considered when selecting a computer.