Main input device for your using your computer. You use your mouse to perform actions in programs, such as selecting programs to open or moving files from one location to another. Multiple types of mice exist, including wired, wireless, and ergonomic mice.
The keyboard is the other main input device of your computer. Of course, you use this to input letters and numbers into programs and manipulate them in different ways. There are also multiple types of keyboards available, such as wireless, and compact versions.