A portable platform system for connecting an external module having a module connector to a portable electronic platform having a flat panel display, a central processing unit and a system bus includes at least two docking bays disposed on a rear side of the flat panel display including at least first, second, and third rails and an electrical connector. An external module of a first width is slid in between the first and second adjacent rails to be secured to the rear side of the fiat panel display, and the module connector is connected to the electrical connector of the docking bay to electrically connect the module to the central processing unit via the system bus. An external module of a second width greater than the width of the first module is slid between the first and third rails and straddles the second rail sliding the two inner rails of the module between the two outer rails of the docking bay, and the module connector is connected to the electrical connector of the docking bay to electrically connect the module to the central processing unit via the system bus.