A computer program is provided that causes a computer to enable a user to make an electronic payment via a communication network. The amplifier also amplifies, according to a second gain value, a second input signal acquired by reproducing second information pursuant to reproduction of the first information, from a second area adjacent to the first area and that has the second information recorded at a recording level different from that of the first information. The electrode parts each include a reference electrode and an auxiliary electrode. This asymmetric treatment of the threads enables+ the system to favor the performance of a single-threaded application while performing simultaneous multi-threading. The potential storage proxies compare one or more resource measures to predefined criteria; and provide an acceptance if the one or more resource measures satisfy the predefined criteria. A sheet-fed rotary printing press having the apparatus is also provided.