A method for managing operating system option values includes receiving a request to perform a function involving an option value in a computing device. In one embodiment, the operation modes of the switching power converter include a switching mode and a linear mode. A hydraulic ram translates the logs sideways into the plane containing the rotating knives. In the trial mode, a user-recorded song is played back initially for the potential purchaser but is not subsequently played back to be later heard by other potential purchasers. The system provides summarization of market data to enable market makers to have relevant and timely data at all stages.