A component of a system receives a first instruction at a server to execute a target program that is unsupported by a server application. Each of the first and second oscillator unit is composed of a DC bias source, a complementary cross-coupled pair, an LC resonator unit, a frequency-doubling sub-harmonic coupler unit, and a ground terminal. The context comprises a set of context components for use in generation of content fingerprints. The extra optical system redistributes light coming from a pixel of the image display system across a plurality of pixels of the image display system. The element is visually distinct from the pad and has converging sides in the driven pad so that wear on the pad is indicated by the amount of the wear element visible to an observer.