A computing device embodiment includes a processor, memory coupled to the processor, and computer executable instructions executable by the processor. At a first resolution, the low-resolution lens is placed on the optical axis at a first location and the high-resolution lens is placed off the optical axis. Each of the first segments is electrically connected to each of the other first segments and to each of the second segments, and each of the second segments has an electric resistivity higher than an electric resistivity of each of the first segments. Sloping faces are formed in the auxiliary insulating layer. An automatic term extractor creates a list of terms indicative of the documents’ subject matter. The metal laminate comprising the novel polyimide copolymer as a layer on the metallic foil has a low curling susceptibility to cause curling, twisting, warping, etc.