An enhanced graphics pipeline is provided that enables common core hardware to perform as different components of the graphics pipeline, programmability of primitives including lines and triangles by a component in the pipeline, and a stream output before or simultaneously with the rendering a graphical display with the data in the pipeline. The dispensing unit includes compartments for receiving medical products therein, and readers for reading the RFID tags associated with the medical products in the compartments. The speech input can be compared to a voiceprint of the user’s voice to authenticate the user to the device. Therefore, a bundle of paper loaded on the waiting tray is caused to fall down on the process tray. Alternatively, a digital implementation provides phase and frequency retention via a sample and delay system comprising an analog-to-digital conversion subsystem, a first-in-first-out memory and a digital-to-analog converter. The support system simplifies removal and installation of the auxiliary power unit from and into the aircraft’s tailcone.