Abstract: The principles of the present invention relate to a collapsible computer platform suitable for use on a seatback tray of an airplane, train, or the like. One example embodiment includes a first platform which may be used to place a laptop or other portable computing device on. The collapsible platform also includes two or more support assemblies. The support assemblies have a top portion coupled to the first platform and a second portion configured to rest on a surface. The support assemblies are configured to be collapsible relative to the first platform and to define a cavity or open space between the first platform and the surface on which the support assemblies rest when the deployed. The defined cavity may provide an open space for storage and work while a laptop computer is placed on the first platform.