A portable electronic apparatus includes a display unit, a key operation unit which detects depression operation of each of a first direction key and a second direction key adjacent to the first direction key and outputs a detection signal, and a control unit which controls displaying of a screen of the display unit in accordance with the detection signal. It is suitable for Gbit memory devices, embedded capacitance devices in multilayered structures, and modulable capacitors for high frequency devices. A plurality of anatomical landmarks is identified on the set of related 2D anatomical images. Once cooled and hardened the formed article is removed.