A system whereby high volumes of related commodities or securities trades with a brokerage firm’s clients may be processed by the firm’s back office systems. In addition, when it is determined that the face of the user corresponds to the face of a first user represented by first user information stored in advance, the indoor unit of the air-conditioning apparatus blows conditioned air that satisfies a first user air-conditioning environment represented by first user air-conditioning information set for the first user toward the first user. The standoff device includes a frame having extendable legs with padded rollers journalled on the end in a \u201cV-shape\u201d for leaning against various shapes of vertical support structures such as walls of a building, columns or trees. The encoder information can be the size of the processing block or the prediction information. The disclosed microfluidic devices utilize a plurality of microfluidic channels, inlets, valves, filter, pumps, liquid barriers and other elements arranged in various configurations to manipulate the flow of a fluid sample in order to prepare such sample for analysis.