An apparatus and method for converting a random binary sequence into a random integer is provided. In one embodiment of the invention, a physical keyboard is operatively connected andor attached to a removable portable device frame of the removable portable device cover, wherein the removable portable device frame is designed to fit a portable electronic device. The lamp housing assembly includes an air distribution assembly having an air chamber that is disposed adjacent to the lamps and pressurized to provide uniform distribution of air exiting the air chamber to impinge a backside of each of the lamps. When a process gas is flowed through the gas passages, a total pressure drop is generated across the first and second gas passages. The invention includes a new settlement method for the money market exchange traded funds that allows creation and redemption of MMETFs on the primary market as well as settlement on the secondary market on a shortened timescale relative to other exchange-traded securities.