To provide an information processing unit that has only to read a bar code or the like used for actualizing e.g. music data and video data so as to reproduce the music data and the video data.

The 1st information read section 21 of an operation pen 20 reads 1st information 23 used to actualize 2nd information 15 and a 1st information transmission section 22 transmits the 1st information 23 that is read to an information processing unit main body 10. The 1st information reception section 11 of the information processing unit main body 10 receives the 1st information 23 transmitted from the operation pen 20, and a 1st/2nd information correlation management section 12 recognizes 2nd information 15 correlated with the 1st information 23 on a 1st/2nd information correlation table 13. Then a 2nd information processing section 14 processes the 2nd information 15.