A position sensor for a transmission mode selector lever includes a magnet and three magnetic flux detection elements that detect magnetic flux of the magnet. The package comprises front and rear walls disposed on opposing sides of a vertical plane; first and second zipper parts respectively joined to the first and second walls; and a slider for displacing the first zipper part relative to the second zipper part in a downward direction parallel to the vertical plane. The translucent portion has an inner space formed therein. The first block if encoded data is written into the primary memory unit. Using the information in the recent-activity-log, the server can institute de-bugging strategies, and correct the problem. The message provision unit is capable of providing a message at a position in a word which depends on the word or the message write unit is capable of writing each message at a position in the word which depends on the word.