The M-Evo Shell is what holds all the components together. All the components are attached to the outside of the Shell. The Shell can be looked at as a case for a desktop computer. The components that can be attached to a shell is a screen, cd drive, hard drive, mother board, RAM, CPU, and a graphics card. There are also different sizes of shells to better fit a customers needs. Each Shell is provided with a power supply that will power the laptop to its needs.