The purpose of input devices is to translate data and information from human-readable format to electrical impulses. The most popular input devices are the keyboard and the mouse. We can type in commands using a typewriter part of the keyboard or we can use arrows to highlight items in menus and we press Enter to make a selection. Quicker way of making selection in the menu system is to move the mouse pointer and click the button.
Scanners are devices suitable for entering of graphical information into the computer.
Some scanners are able to read text so this way of entering textual information will be much quicker than typing.