According to one embodiment, a magnetic recording medium includes a substrate, an auxiliary layer formed on the substrate, and at least one perpendicular magnetic recording layer formed on the auxiliary layer. The kit includes a bell button for mounting near a gas pump and a speaker for mounting inside the store of the service station for alerting an attendant that refueling assistance is needed. The IBMS may include a private andor public server andor agents in one or more IBRs or IBCs. The second friction surface and the first friction surface are in contact. For example, the undefined subset of participants may be defined after the close of betting on the event.