In the data processing apparatus which performs a predetermined process over data to be printed on a printer according to the printer, and then transfers the data, groups of various printing setting values and registration names each identifying each group are mutually correlated and registered in setting-registration files for each user who uses the apparatus. Embodiments may include use of consolidating spacer fluids in displacement of drilling fluids from a well bore annulus. A device registry forms a list of device registry entries, each corresponding to a respective one of the drive instantiations. Compression pins are disposed between and attached to both container and panel so as to apply a mechanical load onto the panel directed towards the container.