A target file generation system and method for use by ordinary computer users enable those users to readily generate target files without the requirement that they know the internal layout structures of the target files. The wall element comprises a main member with an upstream edge region and a downstream edge region. A narrow-band signal is created by reformatting the remaining data space into a contiguous narrow-band signal. , the medicament reservoir, medicament dispensing means and electronic control circuitry means. Finally, coefficients for a rational polynomial camera model are estimated by fitting rational polynomials to at least the grid coordinates and image space coordinates. The synthesized tables are stored in an annex file that is associated with the font, rather than being incorporated into the font definition.