The present invention is intended to restrict the reproducing of disk-copyable recording media. The bits I and Q are differentially modulated, and the tables are indexed based on the differential modulation. Other embodiments provide proximate grouping of vertical lines driven from a same row. In response, the server transmits a menu of MFP functions and costs to the mobile device, allowing the user to estimate and prepay the cost of the specific session through a service accessible on the mobile device. A quasi-interlacing technique is also provided. The biodegradable quaternary ammonium surfactant may be capable of degrading by more than about 90% over 28 days as determined by Method 306 of the OECD Guidelines for the Testing of Chemical.