A system and computer program product for automatically positioning a computer to an ergonomically correct orientation are presented. The lead body includes an insulating structure that protects the flexible conductor element wherein the insulating structure is realized from a polymer material comprises an isobutylene block copolymer. The bioreactor of the present invention can be applied to generate uniform shear stress acting on the fixed plate despite the distance between the cone tip and the fixed plate. In one embodiment, the registry security value is obtained by concatenating system registry information, for example, system registry files or system registry handle keys, and inserting the concatenated system registry information in a one way function to obtain the registry security value. In some embodiments, thumbnails of the user’s recently tuned, or paused on, content are displayed to the user while content surfing.