A method for receiving, processing and managing service requests from a user is disclosed. A special-purpose fast interface, executing in conjunction with an interpreter loop, for native methods reduces C stack recursion in the JVM. Social media mentions are mapped to products in the database system. Emitter degeneration resistors and a transistor Q4 for diverting part of the current to the supply improve the linearity of the mixer. The tab is configured to mate with the at least one tab mating feature.