The present invention is directed, in various embodiments, to a computer system comprising a party database and a products-role database. The integrated circuit includes a plurality of power islands where power consumption is independently controlled within each of the power islands. Calling parties from unknown numbers are given the option of recording their name for audible identification. , cameras, positioned on the UAV, may be simulated. As a result, the utilization of illumination light is heightened and a bright projected image results. Embodiments of the present invention may serve to reduce pressure variations within a fluid path of a pumping apparatus by avoiding closing a valve to create a closed or entrapped space in the fluid path and similarly, avoiding opening a valve between two entrapped spaces.