Portable information terminal, program, and recording medium having the program recorded therein

A portable information terminal comprising:

• a display for displaying information;
• a scrolling device including a disc-shaped member capable of performing a rotating operation centered about an axis and capable of being pressed in the direction perpendicular to a planar surface of said disc-shaped member;
• said scrolling device enabling an operator to carry out a first operation and a second operation differing from said first operation;
• a first scrolling control device for performing said first operation and said second operation;
• wherein said first operation causes said display to scroll through information displayed at a first speed and said second operation causes said display to scroll through information displayed at a second speed slower than said first speed;
• and
• wherein the scrolling device comprises:
• a base;
• a holder mounted onto the base and including a dial support cylinder projecting perpendicularly from the center of the holder;
• a circular scale, including a central hole and slits positioned radially around the central hole, mounted onto the holder and having the dial support cylinder passing through the central hole thereof;
• a dial body, including a central hole, having a diameter greater that the circular scale, mounted onto the holder over the circular scale and having the dial support cylinder passing through the central hole thereof;
• the disc-shaped member including a central hole, mounted onto the holder over the dial body and having the dial support cylinder passing through the central hole thereof;
• and
• a cylindrical button having a diameter less than that of the dial support cylinder and positioned within the dial support cylinder.