A storage medium for recording information data in a protective manner such that an easy data processing can hardly succeed correct reproduction of information such as music information. The memory structure includes a plurality of memory cells and a conductive material. Finishing surfaces such as discrete finishing members can be comprised of a multiphase polymeric composition. A pumping controller controls an amount of electric charge supplied to the first node and the second node in response to the first and second pumping clock signals. A digital controller to sense the output voltage and in response to generate the switch control signals such that the output voltage is regulated to a predetermined amplitude. The system monitors community selections, queries, preferences and profiles to determine popular content authors, categories, etc.