The game disks are much smaller than normal disks (as you can see). The disks being this small saves Nintendo millions of dollars because all other games are able to be burned if you have a mod chip for your Playstation 1 or 2. With the games being so small they can't be burned there for saving millions.
Letter D is for the controllers and E is for the memory cards.
As you can see letter F is a handle and is the butt of a lot of jokes by Microsoft and Sony but it makes for easy carrying.
Letter A is the power button. B is the reset button and c is the open button.