A computer is made out of many different parts. Few are visible on the outside. Most are hidden inside the case.
The purpose of this contest is to take the most artistic photograph of a computer part, or parts. Any computer part will do as long as it's needed for the operation of the computer. For example, Cell phones do not count even though you can connect them to your computer, as your computer doesn't need your cell phone to operate. Basically, everything inside your case (and the case itself, of course), screen(s), keyboard and mouse are allowed.