A computer is composed of a mother board which is placed inside of the box. It has lots of wires and devices such as the hard drive the mother board the ram the CPU the Light scribe DVD burner the power thing that I dont know the name to the power button and multipule spots for the usb slots and the Enthernet ports and cool computers like mine are built in with a soft modem and A cool logo on the outside of it they ususially have a sticker on them that tell you your Product id and if it comes with somthing like windows 7 ultimate pre installed on the hard drive it will have the Product key that is used to activate it and A blue tooth device 1000 BGN WIFI. A computer connects all of those things to the mother board and has out put devices like a monitor and keyboard and mouse you also need a monitor if you don't have a cool computer then you will also need a monitor and a keyboard and mouse. on some of the devices in the computer they have ugley logos like an apple on them which in my opinion destroys the coolness of the computer:) The computer also composed of programs and files some are coded in bionary code (0-1) other files use somthing else this world keeps spinning round