A feeding device for feeding a processing line with printed products, including folded or non-folded printed sheets, from a stack of printed products. In one embodiment, the wet etchant is utilized to pattern a metal layer in a semiconductor structure. The distributed comment moderation service is optionally arranged to provide an indication of an assessment of the quality of the third party resource providers. The data describing the appropriate segments at the appropriate levels of resolution are output to a waveform viewer.