A method and apparatus for reading in a three-dimensional information carrier are presented. The voicemail system includes a media server, which is in communication with a telephone network. The stator rim has a plurality of stator teeth portions in operable communication with the magnet element for rotating the spindle motor hub. The block cipher may operate on the binary value. The park user management system provides a recommendable exercise, a recommendable exercise section, and a recommendable target exercise quantity to each park user, calculates actual exercise quantity of each park user on the day in question, and provides the calculated exercise quantity to each park user. The membranes, together with the substrate, form surface microcavities that are vacuum sealed to provide electrostatic cells.