PURPOSE: To accelerate a link processing speed without loading any burden to a user.

CONSTITUTION: Based on the use frequency information of an input title selected by a selection part 41, a frequency updating means 43 updates use frequency information stored in a dictionary part 30 and reports the information to a rearranging part 45 and based on the updated use frequency information, the rearranging part 45 rearranges the contents of a system compile unit library 50 and a user compile unit library 60 so as to accelerate a selecting speed.