There are many parts to the computer. However, since the computer has changed over the years, so have the parts of the computer. When the personal computer became a common invention in every household, it usually included a monitor that usually sat on the desk with a rectangular CPU that sat next to the monitor or sometimes on the floor. A mouse and keyboard had to be hooked up to the computer. Sometimes, a printer would also be hooked up to the computer. Later, people wanted to consolidate the computer into one machine. This became the laptop. The keyboard, monitor CPU and mousepad were are condensed into one machine.