A magnetic sensor capable of detecting a magnetic field with high sensitivity is provided. The method includes applying a brake actuator, sensing via a first sensor the displacement of the braking actuator, and sensing via a second sensor the hydraulic pressure in the braking system. In one embodiment, a storybook allows a player to win by matching words from a paytable to revealable dialog or other story elements on a respective page of the storybook. A delegate for responding to the audio message is determined. A sales system for selling semiconductor devices uses the sales method and a sales program product for causing a computer system to sell semiconductor devices using the sales method. A controller is utilized for issuing one of a plurality of instructions to the associative memory device, while a clock device is utilized for outputting a synchronizing clock signal comprised of a predetermined number of clock cycles per second.