File flagging apparatuses for hanging and traditional files are shown. The heat sink contains a heat conductive element, a heat dissipating shell covering over the heat conductive element, and a plurality of heat dissipating fins installed on the heat dissipating shell. A set of valves is coupled to the air manifold, and a controller is coupled to the valves for selectively opening and closing the valves to alternately charge and purge the sieve beds to deliver concentrated oxygen into the reservoir. The gaming device provides an award based on the combination of the bonus symbols. An operation matrix is computed according to the three coordinate systems.