Desktop is a personal computer that is intended for general use in one location as opposed to portable computers or portable computer.
Peripheral-table computer peripherals such as computer display, CPU, and keyboard are separated from each other and relatively large (also in contrast to the portable computer peripherals integrated and small).
This kind of computer is designed to be placed and used on the table at home or office.
Desk computer is the most affordable and the most commonly used.
I have some pictures that are suitable for your desktop, this picture is pretty good, here's the picture.