Abstract
In this paper, we propose to extract the socail network of participants from the information system using their accounting records. We discuss the social network feature. In an environment of information system, it is desirable to provide a user with information depending on a user's situation, such as time, location, user behavior, and social context. Since such information was difficult to gain from system, it was rate to be used. We also dicuss the analysis of social network in the campus computer system.
