PURPOSE: To effectively use words to be registered in future and already stored registered word information by providing a program which is capable of accessing a user registration word dictionary in its own way and a program controlling a user registration word.

CONSTITUTION: In this system, a program A which is capable of accessing a user registration word dictionary to other program on a network in compliance with a request in its own way and a program B controlling a user registration word by performing communication with the program. A existing on the network. Namely, a subject which is capable of accessing the user registration word dictionary in particular is not limited to a Japanese processing program aiming at a KANA (Japanese syllabary)/KANJI (Chinese character) conversion but is enabled to be used in the program A delivering and receiving information via the network. The program A receives the request from the program B to be the user registration word control program existing on the network, analyzes the request, executes the access to the user registration word dictionary and returns the result to the program B.