The article of manufacture is a therapy table. Experimental imperfections can be intrinsically compensated for in this way. When the integrated circuit is affixed to the interconnect, the solder bump deflects the cantilever. The analogue filter is configured to cancel the predistortion of the feedback signal. The differential output signal is equalized for transmission to switching, routing or processing equipment or to an HDTV receiver. The user history information includes an alias name of a previous user of the digital content file.