The disclosed methods and apparatus relate generally to the electronics media industry, such as cable television, home shopping services, on-line computer services and computer memory applications. The first scroll has a step portion that separates an elevated portion and a recessed portion of a surface of the first scroll. A diffraction grating receives the collimated laser light and diffracts the laser light and causes a traveling direction of the laser light to be separated according to an associated wavelength of the laser light. The flash is allowed to emit light depending on the controlled amount of the current. To implement desired transfers, the system may communicate with a financial network which may provide communications with the financial institutions of the users. A distal portion of the terminal on the other end side abuts against the relay member receiving body, so that the terminals receive pre-compression in an elastically bending direction of the contact portion.