A system and method for allowing simplified electronic transfer of funds in files subject to sender-defined access constraints. The ion beam focusing system includes two or more electrodes where one electrode of each electrode pair partially obstructs the ion beam path with conductive paths, such as a conductive mesh. The data entry panel of the invention is collapsible to a surface area less than \xbd of its extended configuration by twisting the respective ends of the panel in opposite directions, while applying a slight inward pressure. A second portion of the pixels displays a warning image indicating a vehicle abnormal condition. The relationship function produces a display result that can convey the relationship selection made by the user and that includes an arrangement icon that conveys at least one newly displayed relationship within the graphical user interface and that relates to the icon selected by the user. This includes spectrum sensing algorithms, adaptive optimized sensing of parameters based on changing radio environments, and identifying vacant channels.